I think we all, or at least most of us, have this experience to one extent or another. I certainly do. My all-purpose remedy for intrusive thoughts, as well as anxiety, fear, & other disturbing emotions is a technique referred to as "compassionate abiding". 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/

May it be of benefit.