Hi, My 15 yr old son who has autism recently had severe OCD.
I did a search of autism OCD and it came up with PANDAS where the child has had a strep throat infection and then develops OCD.
The GP prescribed antibiotics and within a couple of days of finishing them he is back to his usual self.
The OCD was so bad he was taking over 3 hours to even get in the shower because of moving things around, he was walking around with his hands outstretched in front of him and didn't have his usual personality.
I just wanted to say what happened in case it might help someone else.