i used to be doing okay, but ever since I had a huge health scare I've been spiraling out of control, waking up anxious, going to bed in a state of anxiety, I'm constantly scared something is wrong with me, that I'll pass out in my sleep or that i have some incurable disease. Even if my doctor said I'm okay I can't help feeling like I'm not. I'll end up reading somewhere about someone having a specific illness and I'll obsess over it for the next few days constantly stressing out that i might have it. I can't bring myself to relax at all

I don't know what to do anymore or how to distract myself from this, i really need some reassurance or tips to take my mind off of it please :(