Annoyed. Mum took drugs when she was pregnant with me?

Please read this. Before I even knew that what my mum did when she was pregnant with me, I always wondered why I was the dumbest in the class. I never understood anything quiet as well as the other students did. Ever since grade 1, actually. I also used to rock back and fourth, and sometimes I still do. It's like whenever music is playing i have to be moving. You see, my mum took heroine, morphine and smoked when i was baby. I'm not sure if there was alcohol involved. I don't want to know! My dad also took lots of drugs and has weird promblems.. like OCD and he's just weird in the mind. Apart from not being very intelligent, i also suffer from a phobia of vomiting and panic about stupid stuff, like i was to scared to get braces and have surgery. My teeth would have been amazing now! But i just panicked too much, and couldn't have it done. now i see 10 yr olds easily going to have surgery and braces. it upsets me. Did i inherit my fathers OCD'ness from him? and did the drugs affect me from my mother? far out, i really want to be a psychologist, or get into medicine, but i'm not smart enough :( it upsets me i try so hard but my parents SUCK they had to take drugs and yeah. is it possible to have a normal healthy baby after taking all those drugs..