I never had one before in my life until early January of this year where I had several episodes of them. It went on for about 10 days. I thought I was having a stroke or heart attack, literally thought I was going to die. It was the worst thing I have ever went through in my life. Some of them very severe, went to emergency room twice and got a bunch of tests done on my heart. Everything was fine according to cardiologist. The doctor said I had one of the strongest hearts hes seen. A week after all those attacks, everyone at my work got covid. It made me think I got covid and had the "brain fog" everyone is talking about. I tested negative twice while this was happening, one rapid/one PCR. Covid symptoms affect everyone in different ways. My co workers all got different symptoms. One had severe stomach issues, the other a high fever, and the other had symptoms similar to the flu. This reaction from the vaccine made me think these two events are related.