I need you opinion of what I should do?

I got an eating disorder in september of last year. They stabilized me in August. In that time I went from 165 pounds to 126 (it's less, I have my period right now which is irregular (only three days every month) Since I am 5'6" ft tall, I am normal weight but I really want to be thinner. I was overweight all my life and people made fun of me for it. Yes, it's embarring when people come up to me and say, "Did you loose weight?" because it is very noticeable, but I want to be underweight. I don't want to be supper underweight, just borderline underweight. Maybe 110 pounds at the least. But I have to go to the doctor's office every week and they might put me in day care (Have to come there everyday for the whole day for a long time) if I do loose weight. I want to loose weight even if I have to go into the prograhm. But my Mom would put me in the type of thing where I have to be hospitilised and she would not visit me which kind of sucks because she was been visiting my sister who is at the hospital 2 times a week because of her bad pregnancy. She is so obsessed with her that she basically wouldn't notice I was gone. Me and my Mom have a good relationship, she just forgets about me when my sister is home. I have no problem with having to go there and stay at the hospital, but I don't want everybody to be thinner than me. I was thinking that if I lost the weight very slowely than they wouldn't do anything, or even if I was doing Ok for a while than "something" upsets me and I loose a couple of pounds. I don't know, what do you think I should do?