We experienced the sudden OCD traits last year after our son had strep. He has just recently gotten strep again and we are seeing an increase in OCD. He was on antibiotics as soon as we got him to the pediatrician. It isn't as severe as it was last year, but I am wondering how long he should be on antibiotics, and if we can expect it to get as bad as it was before? We didn't even know that he had OCD until this happened last year.