Best of luck to you. I had a-fib two weeks after my second Moderna shot and had never previously had a-fib. I was afraid to get my booster but did it anyway. While this is anecdotal, it’s been three weeks since my booster and I’ve been fine. A-fib was scary because I didn’t know what was going on initially, I am praying for everyone here on this thread (whether they get the vax/booster or not) because it is so scary. I pray for those who get the booster so they don’t have significant side effects and I pray for us all that we don’t get Covid. It is nice to have a place to share our concerns and our experiences.