How do you get your child to calm down some?

my 5 year old doesnt seem to stop moving at all, i literally cannot get him to stop fidgeting or moving at all! i entered him into tball hoping that that will calm him down some but yesterday was his first practice and he wouldnt stop spinning in circles and running around and losing interest in what they were doing, he was distracting the other kids from listening, hes such a good boy and he listens but it seems as though he just cant stop moving. and he never stops talking, if theres no one by him he talks to himself. its like a nonstop thing. i have kids coming to me saying that they dont want to play with him and all he wants to do is play with kids. i feel so bad for him. his doctor said that hes marginal for adhd but yet it was still to early to tell and that we have to wait til he is in 5 year old kindergarten to tell if he has full on Adhd (hes in 4k right now) i try to do activitys with him but i have a 1.5 year old and im 7 months pregnant, so its all like making me extremely exhausted. emotionally and physically, how do i get him to relax a lil bit more. i love him to death and i want the kids to want to play with him but i think hes just to hyper for them even. im not sure he knows how to stop moving, even through the night hes constantly moving! any advice or help.