I used to have health anxiety so bad I would think I was having a stroke if I felt a little bit of pain anywhere. I went to hospital once because I tricked myself into thinking I was having a heart attack. What worked for me was finding the right medication, and surrounding myself with calming people. Also, at least for me, over time I learned to tell myself that I've got through this before, I'll get through it again (if you're having an anxiety attack over something). Just know you're not alone! A ton of people go through this.

I have serious health anxiety. When I got strep recently (at the time I didn't know it was strep because my doctor didn't test for it -_-) my temperature went up to 104 and I had to go to the emergency room. I was crying and hyperventilating and saying how scared I was. I was in the ER for almost 5 hours and didn't get home until around 4 am. Then, when I did get home, I fell asleep for maybe half an hour and woke up super delirious and then started having a serious panic attack. My heart was racing and I felt like I was going to pass out. It eventually stopped and I was able to go back to sleep. I've always had bad health anxiety and think the worst when it comes to things like that. I legit was afraid it was something super serious when in reality it was just strep (I only ever had strep one other time in my life and it was when I was a little kid). Everytime my heart races I'm like "omg I'm gonna have a heart attack" or whenever my temple hurts I'm like "oh God I'm gonna have an anyerism" (even though they are extremely rare) and stupid stuff like that. I have to keep telling myself that I am healthy.