I am very bloated, I have A Fib and hypothyroidism, but it is under control, I feel bloated for a couple of days, like I ate something that my body does not like, but I cannot figure it out. My A Fib medication got changed to Multaq within the month, my thyroid level is fine I keep leaning towards gluten, but I have tried eliminating it and I still feel bloated some times. My breathing is fine and I feel good. I have allergies to some foods, could I be allergic to foods I do not realize? Yes, I am overweight and have tried many times to lose it but never keep it off.