Could what happened in the past be a cause for whats happening to me now?

I used to get picked on beat up and ignored by the adult teachers when Id come to them for help same thing with the principle he would make an excuse not to talk to me I used to be 211 pounds so ya fat people naturally get picked on at school, when I turned 18 my doctor told me that I was getting close to having High blood pressure so I started working out at a gym I signed up at along with cutting down the foods I eat I now weigh 128 pounds but now Im afraid of eating food sum times, I don't eat any junk food (cheeseburgers, hot dogs french fries fried chicken)not a single thing like that,I workout at home now. Along with being afraid of eating sum times I also get really strong urges to beat random people that are evan around me to a bloody pulp. Any thing that can explain all this would be helpful