Hello there,
I too have struggled with intrusive thoughts in the past. For me, they were mainly about me being afraid of hurting other people, or myself. They were so awful and time consuming, they caused 4 hospitalizations in two years. What really helped me was therapy (CBT and ERP). Exposure response prevention is basically about exposing yourself to your intrusive thoughts, no matter how uncomfortable they make you feel. And the more you expose yourself to these thoughts, the less uncomfortable they will become. And the wonderful part is when these intrusive thoughts become
boring, and they stop bothering you! I did a lot of meditation where I'd either be alone, or with my therapist...and I'd just think about my intrusive thoughts until they became boring to me. Scary, but very effective.
It has now been about a year since I've struggled with these intrusive thoughts. They are awful to have, and a lot of hard work to get rid of, but it's possible. I hope you're seeing a therapist, or are considering seeing one. They are very wonderful to have when trying to learn to deal with intrusive thoughts.
If you have any questions or just want to talk, feel free to send me a pm.