I was in a strong anxiety spiral. I have some tips for you.
1. NEVER ASK DR. GOOGLE! (A must)
2. Go to a doctor if in doubt.
3. Pray to God. I don't care if you are an agnostic, atheist or whatever. Having faith is enough. Realize that something is bigger than us. When I was water baptized, the fear of having a heart attack or problem instantly vanished. I was pain and fear free for a week. But recently, I am again obsessed with another one and thank God the test is normal.
Again, NEVER EVER consult Dr. Google.