Autism and noise

Hi 

Im new to this group and would love some advise and other peoples stories 

My son is 8 and has non verbal autism - he does not really understand language or communication

He is a very happy boy who loves to play with figures and watch cartoons on his i pad 

He however never stays still and is constantly running and moving and rarely sits down - he also makes a lot of noise copying noises and rythyms he hears on his i pad and re enacts scenes that he has watched over and over again for hours 

when he is in bed he makes the noises continually sometimes until 2 in the morning and seems to get stuck in a loop which appears painful to him and he sometimes crys out of frustration as he does not seem to be able to stop this loop.

My question is is this part of his autism or could it be adhd ? 

Thanks so much for reading and any advise would be appreciated