Yeah so, it's supposed to be standard practice to be evaluated for trauma after accidents, there's an abudance of literature showing, for example, over 20% of road traffic accident survivors develop PTSD. I study osteopathic medicine and they really emphasize the importance of this, one case study was similar to yours so I asked out of curiosity, it seems doctors will often brush off the possibility if they don't immediately detect signs of trauma on the patient, or might even assume those signs to be temporary as a result of shock. Hope you can achieve a full recovery soon.