Hello, I know this post is over a year old but I thought I would reply anyway.
I have had graves since 2015 and have gone into remission 3 times. Everytime my levels are all great and my doc takes me off methimazole. Yet I still have tons of graves symptoms, anxiety, insomnia, cronic back pain, irritability, weird menstration, no appetite one month and starving constantly the next month. I lose 20 pounds in 2 weeks and then suddenly gain 20 back in one week but no change to my diet.
I have told my doctor all these things and she says graves is a constant roller coaster.
Not sure if this helps at all, but you are not alone.