I saw your title and was going to pass on this because the last thing I need is to have more things for my health anxiety to worry about. But I know how freaking hard it is, so thought I could at least offer some support. I am not a doctor or therapist in anyway.

I have health anxiety (among some others) but it's the one dominating my life at the moment. The first thing I learned and I can absolutely recommend is to stop reading Dr. Google. Everything you read will freak you out if you're already close to freaking out anyway. At the end of the day, you don't really know enough to make sense of what you're reading and you don't know the quality of the information the site or the author are giving out. Best to look at most sites on the internet with a very critical skeptic's mind. Take my words here with a grain of salt, too. I know you're looking for something to make sense of what you're feeling, but when you're mind is spinning, you are not able to make good decisions or interpret information correctly. When anxiety is running it's con on you, your thinking is broken and most things you read or hear won't get through all the crazy intact. Best to not assume Dr. Google knows anything about YOUR situation. Heck, you don't know everything about your situation when your anxiety is on full blast.

The other suggestion, and one I still need to work on, is to stop scanning your body for aches, pains or symptoms. Your body will do weird things, that can freak you out in the moment but might be totally normal. And never underestimate what adrenaline and cortisol pumped into your body will do. All of that will freak you out if you put too much focus on it. When your heart beats funny, don't assume that is a symptom of anything more than your body doing weird things. Over time you'll learn the different things that your body does and accept that they're normal FOR YOU. Again, other people, including me and Dr. Google, don't know YOU. Any advice has to be taken with a grain of salt and run through your own BS meter. If anything health anxiety has made my own BS meter stronger.

The last suggestion and the hardest one for me, is to stop thinking about your health. The more you think about it, the more your mind learns that it's important to you and it should keep thinking about it. Even trying to refute what your anxiety is telling you is thinking about it. If your mind tells you that this pain here is something critical to worry about, you can run that through your own knowledge of the situation and simply tell your anxiety "Thanks for letting me know." And then move on. If you try to fight your anxiety with proof of why it's not critical and that you have a completely logical explanation for it (hearts beat faster and harder when you exercise, for example) it just knows you're still thinking about it. Now, this is freaking hard to accomplish. That's where distractions come in. Put of rescue kit together of things that you like to do to relax and distract and have some of them ready at a moment's notice. For me it's music. Music goes with me everywhere I go.

I've heard there are therapies that can help with health anxiety, but I don't have any real experience with them. I tend to take in information with a taste testers mind. If it makes sense and helps, I keep it, if not I don't. So there may be parts of some therapies that help, but not all of it. Keep what works for you.

I guess that's it. I totally understand what you're going through and I'm dealing with my own stuff too. I wish you well, it's a terrible situation.