I have had Hashimotos for the last four years. Mostly I feel well on 125mcg Thyroxine. This summer in particular I have felt really well!! However, over the last few days, temperatures have dropped here in the Midlands, and it's rained non stop. And I feel lousy, exhausted with joint and muscle pains. Been really miserable. Could it be the weather or am I having a 'relapse'????