Biting

I Have 3 yr old child with (SID). He has received OT, at a Sensory gym, as well as speech for over a year and has had a special instruction teacher for about 6 months. So while I was told he had this, I really didn't understand what was going on with him. Now, he has been biting,me, in particular and some times my husband, a lot! I have tried to discipline him several ways. But it seems nothing works. He usually bites when he doesn't get what he wants, he has to make a transition or just because he feels like it..lol. He does this especially when I put him to bed. I have to explain that I sleep with him because he does not have his own bed.

So, I think this is a major contributor to the biting. As soon as we get to bed, he sometimes starts biting and attacking me really. He laughs when he does it. I don't laugh, I say no to the biting and he still does it! So, I need to know if anyone has any advice on what to do. His OT Therapist says to give him a biting ring when he wants to bite and once I tell him not to bite, to leave it alone. Not to bring too much attention to it. So, please any advice???