I have Graves. I had iodine treatment 2 years ago. GP practice not offering thyroid checks during Covid 19. For a number of weeks I have been sweating profusely and my scalp and skin has excessive lesions/dryness. I take 100mg levo x 4 days a week and 125mg x 3 days a week (after 2 years of trial and error - but readings can still be up and down). My last bloods in October showed Vit D was extremely low/negative, so have taken daily. In absence of blood test, should I assume I'm over on Levo and cut back for a few days?