hi... best thing to do is use cognitive behavioral therapy along side with the meds you take. I myself am an obsessive compulsive, but also a schizoaffective...(in better words, schizophrenic and manic depressive)....
Ive been obsessive compulsive since I was 9 years old, and now Im 35. I went untreated for ocd for 24 years.... begging to be treated for it by every doctor I saw. (course, they had to be bash over the head with it).
I have ocd in a very bad way... its my worst of my disorders, yet with 80mgs of celexa and the CBT therapy I got from the book "brain lock", plus using the advice I got from doctors over the years, and a little inginuity with the cbt method, Ive beaten my two illnesses to a point where I have freedom to think clearly. Unfortunately now I have to learn my life skills that went neglected for 15 years.
I got a form of cbt for you to try. Mindful of your intruding worries, confess that you do that all the time to God, and apologize for it, like as if it were a bad sinful habit, and promise never to do it again, but to live an upright life, in a well balanced manner pleasing to jesus if He were an extremely understanding person (since He is). With your mind focused on that, leave your obsessions to God to deal with. He`s better equipped. This way your mind isnt on your worries its on living life which He would want you to do for yourself.
Good luck.... P.s. This cbt therapy is an adaptation of the prayer of salvation, which you should use also to be saved, if you are not christian. Otherwise being a non beleiver in Jesus, He wont be able to help you.<
And it all should be done in deep sincerity. peace your friend James