I'm in the same boat as you. I don't know what the best thing to do is, but if you can try not to latch onto the thoughts - allow them to come but allow them to go too. Try to refocus each time and if that doesn't work distract yourself until the urge/thought passes. My t says just because you have the thought you don't need to act on it. I know that all sounds simple and is easier said than done, but I've found not clinging to those thoughts and not allowing myself to obsess over them has help me a little.