Oh, that sucks! Sorry you went through that, even 17 years ago. DX

I remember quietly wondering if I was having a heart attack for several days a few times off and on. I went to the ER, they said my EKG was fine, Covid negative, went home and after a week it settled. Fast forward a few months, the same issue recurred, I came back to the same ER about it, they saw my EKG and told me I likely had pericarditis, but what's worse, is the doctor on call said he looked at my past EKG and said it matched; they'd missed my pericarditis diagnosis months prior. It sucked. And the meds just sent me back to the hospital again and again. XD

Did you end up on colchicine, too?