I have a lot of these kinds of intrusive thoughts. Yes... I presume they are the result of anxiety (which I have a lot of!) I don't believe there is any way to stop them. There is only acceptance of them... "compassionate abiding" is how it's referred to in the Buddhist literature. Perhaps you're familiar with it? If not, here's a link to a mental-health-oriented description of the practice:

https://mindsetdoc.wordpress.com/201...e-abiding-101/

I suppose this could also be viewed as a form of "Pure O"... (obsessive compulsive disorder.) Family therapist Kati Morton uploaded a video onto her YouTube channel on the topic of Pure O. Here's a link to that video:



Hope something in these resources will be of benefit...