Intrusive thoughts are the worst! My therapist and I worked on this a long time ago. I try to remember some of the techniques. Sometimes easier said than done. I had to imagine it the whole way through (mine were different than yours). I know that sounds weird, but it was like taking the power away from the thought. I've had them bad again and it's been harder working on it this time but I think it's because I still am not stable on meds yet. I hope it gets better. I'm glad it's not causing too much anxiety though!