Hello,Im not any expert,but 1st thing i would do is change Doctors as I went thru the same thing with VA Doctor ignoring multipule health problems,as some of thes problems could be caused by panic attacks I could also be possible you have a possible ignored Injury somewhere in your body from your accident,you should have a full CAT Scan or MRI which is better thena CAT Scan to look for possible injuries in your discs or nerves Head ,but unless you change Doctors this from what you say will Never happen.I have had 14 different surgeries 1 was sinus,it is possible but cant tell from your listing what was injured im your accident,but possibly if you hit your face it could have shifted the bones in your nose causing your Breathing problems,I would also have a Doctor do blood work and check your Thyroid,as mine is messed up,it runs in my family,as well as strokes and 2 in family with heart problems,that dosent include me,which I also have heart problems.Jim