HELP! My son on the spectrum is crippled by his OCD

I am new to support groups. I hope you can help me! I have a 10 yr old son. Diagnosed ASD at 4. He did ABA therapy until he was 7 and we found sucess. Lately his OCD has become crippling. (Not letting me touch him, won't eat anything I make, will only eat off paper plates, using toothpicks instead of his fingers on the keyboard, won't use utensils)... Anyway, I am trying to start up ABA again, but I'm not sure if that's the path I should go down with these OCD issues. Advice from spectrum/OCD parents? Is ABA the right choice or should he start seeing a therapist?  Has anyone put their spectrum kids on OCD meds? Thanks so much!