I have been on Imbrevica since 2019, lately have started having acid reflex. If I slow my eating down and chew foods for longer times, that seems to help
Every so often I take Tums

You can get Omeprazole at Costco for cheap, and it works for me. But I'm not on meds right now.

Wouldn't hurt to ask your doctor and maybe take an over the counter Pepcid or omeprezole.

Look for the cookbook
Dropping acid the reflux diet cookbook and cure. It really helped me get started

I do get dizzy and off balance ,but not bad .
A fib sounds a little scary. I wish you well
Thanks for responding .