Obsessive compulsive disorder and my four year old...Help!

Does anyone know a whole lot on obsessive Compulsive Disorder and four year old boys? My son is four with OCD. He is preschool. His teacher say that she sees alot of parallel play form him and a obvious lack of fine motor skills as well as a lack in large motor skills. What can I do to help him. Is there anything else I should be looking for as far as behavior and how to set reasonable limits. His language is a bit strange too. He talks about things and sometimes I cant understand him and sometimes he speaks clearly but his whole thought process seems off. Help. What do I do. Should I be worried or will things start to correct themselves in time?