My 27 yo daughter got her Pfizer covid booster on Dec 30th. She had almost the same reaction as after the 2nd shot - fever, chills, headache, nausea, sweats, etc. My day 4 everything resolved except she started getting palpitations. She thought it was because she was still tired after the booster reaction. After a week she saw her go who blew her off saying it wasn't the vaccine after taking an EKG which was normal. Ordered bloodwork - no results yet and told her that the palpitations she is feeling is probably from something else. I am on pins and needles right now worrying that it is serious. She will be contacting a cardiologist today and try to get in asap. Should she and I be this worried?