Car accident 8 days ago with some seat belt bruises on side near right hip, chest tightness, feeling of suffocation, pressure in upper abdomen relieved only by standing and extending arms out to side or higher , rapid heart rate new onset atrial fib, shocks back to regular rhythm. Much discomfort with ths abdominal pressure, feel I can not lie down or I immediately get suffocation feeling, not getting much sleep, miserable.