Have been having a slight stab like pain in what I feel is my lungs, was constant for th emost part for two weeks, start lookin gon the internet and am freaking myself out, thinking it could be lung cancer . I have an dr. appointment on friday for this. I do smoke but am in the process as of right now to quit. just a little soothing advice would be appreciated, for example if there are other things that would share these symptoms