I am 19 and my period has always been irregular. I has sergury about 2 years ago (apendex) and may period way ok for a while but its been 5 months and no period. I have lost about 30 pounds since sergury. I am five foot one and now weigh about 96 pounds. Is that considered being under weight for my height? I dont do any drugs or dring alchol but I do smoke. I don't really want to go to the doctor unless I really have to is there anthting I can to on my own to help my situation? What do you think I should do?