Hi, VA;
I don't have OCD, but, did have a student many years ago who did. With him, it manifest with the stereotypical hand washing fixation. I honestly don't know too much about it but, often wondered if medication for OCD would help an addict overcome their obsession for their drug of choice, and the compulsion to use it. I've asked numerous mental health people, but, never got a straight answer. I think there's not a known answer, but, I do wonder if it's ever been tried as a help aide to overcoming addiction to any drug.
I do wish you luck, VA. I hope someone comes along with more information to share with you and to help you.
Shalom!