Heart Palpitations

Does anybody else get waves of anxiety, specifically health anxiety? As of recent I had a weird heart palpitation and then for the next three weeks I was having tightness in my chest and just general discomfort. I went to the doctor and got ECG done and bloodwork and everything was normal. Started to feel 100% one day that lasted like 2 weeks or so. Then two nights ago got a heart palpitation, the day after had chest tightness and dread feeling, which leads to today where I’m feeling physically pretty good but still definitely have that chest anxiety and overthinking and hyper-fixation. I guess I was wondering if anybody has these phases of anxiety that start with heart palpitations? Every time I start feeling like this it seems to start with a heart palpitation.

Also I can try to convince myself that I’m okay because if I actually had an illness it wouldn’t affect me for awhile and then just go away for a few weeks, but doesn’t seem to work all that well and my mind fights me (just putting this in because I’ve seen other posts about it.)