ds is three ,he has gdd but over thease past few weeks hes been really not his self, screaming his head off ,banging his feet ,arms legs etc ,and smacking his self very hard in the face ,that is leaves marks ,if i go to comfort him he goes really mad i hate to see him like this we are just waiting for his results of his mri scan me and dh thinks he has autisem any ideas as its so upseting to see him like this