I guess I'm just looking for advice but venting at the same time. 

I had my first -- I'll call it a panic attack -- early 2020 or late 2019, I don't remember. I'm not sure if it can be considered a panic attack because I'm undiagnosed, but I was shaking for maybe 5-10 minutes, my heart was racing, and I was definitely panicked. I legitimately thought I was going to die because my heart was racing so fast. I got an ambulance (which I later regret due to the cost), and got an EKG done. Completely clean, no issues. This was completely random - I had no panic related issues and no health related anxiety prior to this. But this very random attack started my heart-health anxiety.

My second panic attack happened on December 2020, and took me by surprise as well. I was trembling, feeling immense fear, and had a racing heart. I did not go to the hospital this time, so I had nothing to reassure myself that my heart was healthy.

Ever since, I've had major cardiovascular health related anxiety. My normal heart rate is already higher than average but within healthy range. I'm scared of exerting myself because I'm afraid I'll get a heart attack or stroke. Any minor palpitation will trigger major anxiety. I just had a heart palpitation that lasted two seconds. 

How do I deal with this? Worrying about my heart is triggering my anxiety, and my anxiety is probably elevating my heart rate and might be causing some palpitations. I'm in a catch 22.