My attitude please help : /?

Hey guys, my name is Chris i'm a 15 year old boy. I've been having some problems lately getting along with my mom and step dad. I recently just came back with my mom from 6 years in a foster home. I have ADHD and depression wich i'm currently taking pills for, (Concerta & Zoloft) I've been taking these two medicines for about 7-8 years now and they have worked fine in the past. Unfortunately I haven't been doing so well at home with my parents, I just want to be left alone and be able to do what I want how I want or when I want. I'm usually never like this except when i'm not on my medication. But i've been taking my medicine every day but I can't controll myself. I know i'm hurting people espeacially the ones I love but I don't know how to change even though I want to..really badly so everything can be back to normal. I know what i'm doing is wrong but I can help but to do it. Please help