I can relate, I have OCD also. The constant worrying/obsessing is the easy part for me to deal with. I write, a lot, and then go through and look at my thought patterns. If their are cognitive distortions there then I write a new sentence with a positive (or at least neutral) tone. I then write down a positive affirmation to counter what ever the root problem is and repeat this to myself over and over. Sometimes I need to do it every few minutes but eventually (sometimes after hours) the obsessing thought goes away. The pdocs have given me the option to up my meds to deal with this but I feel its something I need to learn to cope with.

Its the intrusive thoughts I have more difficulty with. What are some techniques people use for intrusive thoughts?