I'm the exact same as parent comment. For me, I was a bit pressured into getting the booster. I also thought it was 3 and done, it wasn't clear that it could potentially be recurring. I also thought maybe the reaction wouldn't be as bad as after the 2nd shot, but it was. Also, I've read more about myocarditis and don't really want to keep exposing myself to that risk.

Is having your heart hurt a normal side effect? A lot of anecdotes mention it as a symptom. How many of them actually go to get diagnosed?