Hi, I'd like to help you with your problem.
From what you described, it definitely sounds like you have physical issues. As a therapist, if I saw you in my office, I would make an immediately referral to a doctor for an evaluation and treatment.
That said, it sounds as if you might also be dealing with some psychological problems as a result of the trauma you went through. You described flashbacks, which can sometimes be attributed to Post Traumatic Stress Disorder (PTSD). I am not saying you have PTSD, but you may want to be screened for this diagnosis by a therapist. PTSD is characterized by flashbacks of the incident, feelings of distress about the incident, a physical response such as being startled or having sweaty palms when reminded of the incident. Avoidance of any reminders of what happened is also common.
Some of your physical symptoms may also be part of a psychological response to the accident. Seeing a therapist will help you clarify which symptoms can be treated through therapy and which are ones you need to take to your doctor or other treatment team members.
I hope this helped,Kate