please also take into consideration that if you are suffering from anxiety then any bad thought will upset you more than usual.

i suffer from anxiety also. it's amazing that i will be afraid to go out of my apartment and, when i do, none of the things i was visualizing or fearing happen!

intrusive thoughts might also signal PTSD. please discuss them with a T if necessary. sometimes mediation may help, one of its actions is not to get involved with negative thoughts. instead, recognize they are just a thought and let them pass. eventually, provided there is no other problem, the intrusive unwanted thoughts may go away on their own. i am so glad you are able to recognize them for what they are!