Chali, which BCAA drink specifically do you consume? Most of those drinks contain Aspartame (aka nutrasweet or equal) which can cause many of the side effects that you have. I drank diet cokes for years and got really sick on the Aspartame (headaches, brain fog, memory loss, fatigue, etc). I'm pretty sure that's what precipated my AF. In any case, DEFINETELY should not consume Aspartame or any other artificial sweetener when you have AF.