What is wrong with my 7yr. old? Someone please help!?

2nd grade, in new school, can't stop talking, can't do work, falls off chairs, keeps getting in trouble, has to be the loudest kid, makes goofy noises, hyper, won't listen, dad not around, can't keep hands to himself, goes to principals office, they want to have a meeting, since kindergarten been to 3 psy. docs & starting new pediatrician. School calls me everyother day, been on Adderall, Straterra, Concerta & Ridalin, all made him hyper or mean, speeding out, fast heart beat - was in hospital. At my wits end! Don't want to medicate him. Exhausted! He can be very smart & very sweet. But gets mean, mad, can't get along w/ other kids in school. Doesn't hear me to get dressed, doesn't look out in parking lots. In overdrive & charged as teacher would say. What can we put him on to slow him down? Tired of doctors & therapists. Nothing working! School iced head today cuz he fell off chair. Been like this since kindergarten. Birth was ok, diagnosed w/ developmental delay at 1 yr.