I'm 19 years old and I'm having a lot of trouble. I never feel hungry no matter how long I go without eating. I have extreme constipation, I pretty much can't go to the bathroom without taking a laxative. (or two or three...) I also have pain and discomfort in my pelvic/abdominal area. I can barely eat without feeling uncomfortable yet it seems that I don't lose any weight. I may have strange periods but I'm not quite sure.

This problem has been going on for 6 months and it's making me very depressed because I always feel extremely "backed up" and uncomfortable. It makes it hard to even live my normal life. I've seen a few different doctors but not gotten any luck. I've had blood tests, a pelvic and abdominal ultrasound, a barium swallow and a CT scan.. All of which came back normal

Please help me figure out this problem, I've heard about IBS and such but I think its something more specific than that.