How to get over my past to be healthy today?

Okay, when I was 10, I was adopted, along with my 5 brothers and sisters. I was okay for having been in foster care for most of my life, I didn’t steal, I didn’t really worry all that much about how my body looked. I might lie once in a while, but I was okay. After a few months, my parents took me to a doctor who told them, that at my weight of 125lbs, I would probably become an insulin-dependent diabetic, caused by type 2 diabetes. He also perscribed me some “crazy pills” as my parents called them, which made them dislike him, and subsequently, decided the best thing to do would be to not take me to ANY doctor. They, although they did not like or agree with the doctor, still thought he was right about the diabetes. What they decided was the best was to handle it was weigh me EVERY Friday, and, if I had gained any weight in school, would only give me one egg for breakfast and chicken broth for dinner, the whole weekend, to make me lose the weight again. They also went to my school and told the lunch lady about the diabetes thing, which she believed. Because of this, and I realize this does not justify it, I just want to explain, I started stealing money and other kid’s lunches, then I would go to the restroom and make myself throw-up, so that my parents would not know, but I would still gain weight. Once, at 13, I ran away, but had no idea what to do. I went to a church, where they called CPS and then I was taken to a halfway house. I wanted so badly not to return to my house that I told them I was going to kill myself if they tried to make me return there. I was taken to a crazy house, where I talked to a doctor. She realized that I wasn’t really crazy, and called my parents to come and get me. I didnt really know how to explain what was happening to her, so I was forced to return with them. I was kicked out of a highschool because of the theft. I had stolen a girls wallet, to see if there was any money in it, but it only had about a dollar. I was put into a hs for troubled kids, for 9th graders only, but I started talking to the counselor about what was happening when she caught me throwing up. My dad found out, had her fired and moved me to another school. Next, whenever other people came over to eat, they would allow me to eat a “normal” amount, and whatever dessert they were having, as they had also cut sugar out of my diet. I was constantly told, even at my lowest weight of 105 ( I was 5’7” at 10yrs), that I was fat and ugly. I was only given clothes that were given to my mom by friends whos parents had died, (my mother was 53 when I was adopted). I finally ran away when I was almost 16. I came to san francisco, where I now live. Now I am a mother and pregnant again, so I am trying to stop the bulemia. I try to talk to my father about how he hurt me, but he always has an excuse about why I’m not really bulemic. He teaches a drug/alcohol counselor program for a university in California, and studied psychology, so anything he says is right, and anything anyone else says that is different is wrong. I tried to tell them what they were doing to me when I lived there, but he didnt believe it until he read about like 3 years later in some magazine. I wish that I had never signed the adoption papers… I cant sleep recently because of thinking about this. I have no idea what to do or where I can go to get help with this… Please only give constructive advice.