if thinking too much makes you uncomfortable, then try to believe that you hate being uncomfortable... just practice staying comfortable, and not doing the things which make you uncomfortable... this helped me very much with OCD.

also i used to constantly tell myself what to do, and how to do things, and this went away after i practiced making myself believe that i hated telling myself what to do and that it made me uncomfortable, and i hated being uncomfortable...

let me know if it helps you...