feeling sick....

haven been feeling too good for the last couple of days... pinpoint this to either one or a combination of the following factors:

i) been taking too many chest x-rays these 3 months(in total 3 but the last 2 came in a matter of a few days) ~~a case of too much radiation -_-" ~~
ii) medication for my broken back??
iii) too stressed over my visa application

results: perpetual blocked nose and a shortness of breath... any doctors out there reading this???