Not all GPs are equally adept when it comes to OCD, or mental health generally. I think it sounds like you do have OCD. Why not return to him and say that you believe that it IS OCD, and you want to see a specialist? Don’t take No for an answer.
Try not to be frightened. I’ve been there. It can be very alarming, but, trust me, OCD is just a nasty bully.
