i was in a car accident on july 27th. front seat air bag , did not see it coming. i blacked out, was confused and my entire body felt like all the fluids drained out, just dry inside. but then i felt wetness on the right side of my head but no external injury, the wet was on the inside of my head?? was transported to the hospital by ambulance and after cat scans and xrays released with the diag. of concussion and "beat up". since this i get short of breath with little exertion and am coughing up yellow thick phlem, and i have not moved my bowels except a tiny bit each day, is this associated with the accident or a coincidence?