So I'm a 15 year old girl, I weigh around 103lb and I'm around 5'1. I got my period when I was around 11, and about 3 years ago I lost 24lb. Since I lost weight my period has never been 'normal', meaning I've never gotten my period every month. I've gone from 3 to 6 months without getting my period. My weight has also fluctuated quite a bit. Around two weeks ago I got sick and went down to 97lbs but now I'm back to around 102. I exercise very often and eat pretty healthy but I change my diet up often. During the end of the school year I got very stressed and was having trouble going to the bathroom as well. I also get very bloated to the point that it is painful. If I push on my stomach when I'm lying in bed it makes squishy noises and sometimes I have a bump right above my pelvis that literally makes me look pregnant. The spot to the right of my belly button is always very VERY painful if I push on it. Also, sometimes after I eat I feel very nauseous and feel like throwing up. Ive never had sex before, if that matters. I've felt like this for a while now, and I really want to get better. I'm thinking about asking my parents to take me to a doctor. Before I do, any advice on what you think is wrong? Thanks :)