I know I’m not alone in having health anxiety so thought I’d share what’s helped me (the last few days at least). It’s based on the 15-minute principle - that 15 minutes isn’t too intimidating to make a start on something. But it doesn’t have to be 15 minutes - cut it to 30 seconds if that’s what you need.
My anxiety has been about leaving the house by myself - something I have to be able to do if I’m going to return to work.
So the first day I pottered about in the front garden on my own. Set a timer for 15 minutes and felt ok. Next day I took the dog down the road. He was a bit surprised when we turned around, but never mind (other people walk him properly before you ask). Today though we got all the way to the park. A full 35 minute walk by myself. I know for many people this isn’t a big deal - but for those struggling, hang in there.