Psychiatrist is step one...but having a therapist is also extremely important. What I have found to be helpful is regular therapy in addition to medication. This would help you learn techniques to stay in the present because what's mainly happening when have these obsessive thoughts is that our minds are in over-drive. A connection with the present moment and whats happening around you creates a disconnection in the obsessive train of thought. So, therapy definitely. Try meditation...it is helping me a lot...it'll be difficult in the beginning but with time you mind will begin to calm down. Also, reminding yourself to be mindful...when you are in a place, listen to the sounds ...touch the things around you and focus on the actual sensations, that might help you as well, it helped me.