I Worry Too Much

Apparently according to my mother I look thinner, she made me get on the scale and I'm 104. According to her last year I was like 124 or something. I'm not even trying to lose weight. I'm 5'3. Maybe its my depression? I'm not sure...all I know is I'm not anorexic. My mom thinks I throw up my food. truth is, I hate throwing up, and I eat all my food. I don't get it. why am I losing weight? My mom says I look very pale, I don't see it. I put some shorts on I got last year and they literally fell right off. I got a cold last week...I haven't had one in forever...I'm probably crazy for thinking this but yesterday I looked in the mirror and saw my arm...and I have veins popping out...I thought that was for old people...I guess I'm getting old or something...and for some reason that worried me. I can hold my wrist with my thumb and middle finger. I feel weak, and empty, I'm not sure whats wrong with me...