I've been having an issue with chest tightness. it comes and goes, and it only hurts for a little while after I sneeze or something. my doctor couldn't find anything physically wrong so maybe it due to my anxiety? but that doesn't explain why sometimes it hurts so bad for a while. everytime it really triggers my health anxiety and makes me worried I ha e some heart or lung condition, even though there's no medical evidence of that. any ideas?