(sorry for bad english)
i hope this can help some people, ive had health anxiety for almost 1 year and it somewhat stopped simply because i stopped thinking negatively everytime i had a symptom.
As an example, back then, when i felt dizzy, i would constantly think about it, that only made things worst and prolonged the dizziness for days or weeks BUT now when i get dizzy i stop thinking about it and guess what? dizziness goes away after 10-15 minutes. It's all in your mind, your brain is a powerful machine but in the case of health anxiety, it can work against you. Back then, everyone told me the same thing i'm telling you now, to just stop thinking about it, but i couldn't believe the solution was this simple. It takes some time but it works.
anyways hope this can give hope to some people to help them stop thinking about the symptomes you have, if yor doctor tells you are fine, you are fine, no need to constantly worry, you only have one life to live and cant let anxiety control it.