Shifting thyroid gears?

Trying to research hypothyroid symptoms and treatments while experiencing one of its most common symptoms (brain fog) is so frustrating.
I did find some information on reverse T3 and T3 resistance. Medical mumbo jumbo is very hard to sort through even on my optimal days but currently I am in such a haze that it makes little to no sense to me. I think I will have to print it out and take it to my doctor at next week's check up. It might not apply to me but it can't hurt to ask. Changing my prescriptions and dosages hasn't helped so far. I feel like my brain is in reverse but maybe it is my thyroid.