How Can Behavioral Disorder In A Teenager Be Managed?

My son is 16 yrs. old and from birth has had strange or not typical behaviors. Things such as rolling over at 12 days of age, at 4 1/2 months he suddenly would not be able to sleep without me driving in car radio on low till he finally passed out , this continued until he was around 10 months of age, walked at 10 months, didn t speak understandable words until 2 1/2, but understood everything you said to him, figured out the parental lock code on TV remote 4 different times, wouldn t eat from a spoon until 1 1/2 yrs, telling him no was simply useless, time outs were just a joke, basically like trying to coral a lightning bolt in a jar, terrified of pictures being taken (I have one pic from age 3 1/2 months) could not have others taken until he was 4 1/2. He was diagnosed ADHD at age 4 placed on medications with some success, at 9 yrs old diagnosed bi polar, 12 yrs diagnosed with behavioural issues more meds. Law has been involved several times because of his tantrums either at school or home, I have left Drs. appts because of his behavior, left stores because of his behavior I am at my wit s end I don t think the diagnosis to this point are correct but don t know where to turn for appropriate help. Any advice would be welcomed.