I'm 21 years old and have been smoking for less than a year (recently quit) and only an average of two or three cigarettes a day, sometimes less.

I dunno if it's just a pulled muscle, or heartburn, or because I sleep on my side, or because it's humid or allergies to pollen this time of year, but I have this weird dull ache in my right side of my chest under the ribs that kind of comes and goes.

I don't have a cough or shortness of breath, in fact I exercise every morning without any noticeable fatigue (at least any more than the standard out of shape because I just started exercising daily after several years of being lazy). I also definitely don't have a loss in appetite and have if anything gained a little weight the past year, though that may be just a side effect from the zoloft I've been on for a little over a year.

I'm probably just paranoid because I just today woke up with this pain... but could it be cancer? I hope not, I've been having small panic attacks all morning worrying about it because that's always what I do when something out of my hands and potentially dangerous comes my way.

I just want to know what this is and pray it's not even remotely cancer related. any information would be so greatly appreciated!