The crash itself takes a few seconds. The week after it takes a week, and that week is where most of the story gets written. This desk has watched the pattern play out on the valley floor and up on the bluffs enough times to know the shape of it, so here is the shape, in the order it arrives.
The first hour: everything works, which is the problem
You are on the shoulder of 64 near the Chesterfield Parkway ramp, or in the turn lane at Clarkson and Baxter, or on the gravel edge of Wild Horse Creek Road. You have checked on the other driver. You have called it in. Your hands are shaking a little and you are already composing the text to whoever is waiting for you.
What you are not doing is feeling your neck. That is not courage. It is chemistry. The stress response that gets you through the next hour dampens pain and narrows attention, and it does not care that your cervical spine just went through a whip-crack it was never built for. People walk away from rear-end collisions on the valley flats, finish the police report, and drive home feeling mostly fine. Mostly fine is the phrase to distrust.
If anything in the first hour is obviously wrong, the answer is not a clinic. Chest pain, a sudden severe headache, weakness or numbness on one side, trouble speaking, a loss of bowel or bladder control, or a head injury with vomiting or worsening confusion is an emergency room trip right now, not a call to a clinic. The clinic is for what comes after the emergency room clears you, or for the far more common crash where nothing looks wrong yet.

Day one: a bad witness
Here is what the desk hears from readers again and again. They go to bed the night of the crash a little stiff. They wake up the next morning and cannot turn their head to check the blind spot on the way to work. Or the headache that they blamed on stress is still there at lunch. Or they reach for a coffee cup and their low back reminds them of the seat belt.
Whiplash is the common name for a neck injury caused by a sudden back-and-forth motion of the head, and the National Institute of Neurological Disorders and Stroke notes that symptoms such as neck pain and stiffness, headache, dizziness, and shoulder or arm discomfort can appear in the days after the injury rather than at the moment of impact (NINDS, whiplash information). That delay is biology, not weakness, and it is the reason the exam should be booked before symptoms fully arrive.
So the rule for day one is simple. Do not grade yourself. You are a bad witness to your own injury for at least the first forty-eight hours. Let a clinician with a dated chart be the witness instead.
Days two and three: the symptoms report in
This is the window where most West County readers first admit something is wrong. The stiffness has spread. Sleep was bad. A few people notice they cannot look at a screen for long without the headache sharpening, or that they snapped at a kid over nothing. We wrote a whole piece on this window, two days later, because it is the most important and least understood part of the week.
If you have not already called, this is the day to do it. The near room for Chesterfield is the O'Fallon room of Missouri Injury Clinic at 2163 West Terra Lane, straight west on 64 across the Boone Bridge. The number is (636) 280-0990. Say it was a crash. Say when. Ask for the earliest exam they can give you.
"I was in a crash on Tuesday on 64 near Boone's Crossing. I was rear-ended. My neck and upper back hurt and I have a headache. I would like an injury exam this week." That is the whole script. You do not need to have decided anything about a claim before you get examined.
The first visit: findings, written down
The auto-injury lane at Missouri Injury Clinic is defined on the clinic's own site as diagnosis and a treatment plan after a crash. That is what the first visit is: a history of what happened, a physical exam, a diagnosis if the findings support one, and a plan you can repeat out loud. All of it dated. We walk through the visit in detail in from the valley to the exam table.
You leave with a direction. Recovery gets a plan on day three instead of month two. And the record of that visit exists because you did the medically sensible thing promptly, not because anyone asked you to collect paper.
Weeks one through four: the plan does its work
Soft-tissue injuries heal on their own schedule, and the schedule is measured in weeks. What a plan adds is direction: what to do, what not to do, when to come back, and what would make the clinic send you somewhere else for imaging or a different specialty. The visits after the first one add dated notes, so progress and setbacks are both on the record, and a change at week three is a change from something measured rather than a guess.
Readers sometimes ask whether it is too late if they waited. It is not. A later exam is still a real exam, and being honest about the timeline is part of the record. Go anyway.
The quiet benefit
Everything found and planned at that first exam is documented and dated. If a claim is ever part of your story, the dated record from the first exam is what everyone will ask for. That is the whole of it. No theater, no special process. Honest care, written down, covers both jobs.
If you already have an attorney, bring their contact so records can be sent where they need to go. If you do not, you do not need one to be examined. The record is a care document first. It exists so the next clinician works from facts, not memory.
The bright line, once more
An injury clinic is built for planned care. Chest pain, a sudden severe headache, weakness or numbness on one side, trouble speaking, loss of bowel or bladder control, or a head injury with vomiting or worsening confusion means the emergency room, right now. The hospitals on the West County side are the right call for those. The clinic is for the week that follows.
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Missouri Injury Clinic
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One clinic, three rooms, one chiropractor's standards. Joseph L. Hollingsworth, DC, publishes three lanes: auto injuries (diagnosis and a treatment plan after a crash), TBI and concussion rehab, and sports injuries. For Chesterfield the near room is O'Fallon, straight west on 64.
Call the room you can drive to this week, say it was a crash, and ask for the earliest exam. If you already have an attorney, bring their contact so records can be sent where they need to go. You do not need to have decided anything about a claim before you get examined.
Book the exam this weekEditor's notes
Emergency first. Chest pain, a sudden severe headache, weakness or numbness on one side, trouble speaking, a loss of bowel or bladder control, or a head injury with vomiting or worsening confusion is an emergency room trip right now, not a call to a clinic.
Everything on this desk is educational reading. It is not medical advice, and reading it is not an exam.
This page is advertising. This desk is compensated for featuring Missouri Injury Clinic, and it is not the clinic, not a law office, and not a party to anyone's insurance claim. We publish only the lanes, rooms, and hours the clinic publishes on moinjuryclinic.com. We do not write reviews, rank providers, or give medical or legal advice.