Hi Ipod1! How are you? I hope you are feeling better. I just wanted to add that intrusive thoughts can be a part of generalized anxiety order, so I agree with PurpleFlyingMonkeys that anxiety could be the root cause. Doesn't make it any easier though, I am sure!
I hope you will be feeling better soon. Remember when you're starting new meds that they are unlikely to work right away, most have to build up in your system for awhile first. Thank you for sharing with us!