Yes, I have been on rosuvstatin for years. Could that be it? I also have Hashimotos ...
Statins are one of those things you have to make an individual choice over. Some react to them, others don't. Some believe they're needed to bring cholesterol down, others that cholesterol isn't the problem.
The Great Cholesterol Con by Dr Malcolm Kendrick makes a case that statins benefit few people other than men with a previous hart episode, and women not at all. There's another book with the same title by Anthony Colpo.
Another non-believer in statins is Duane Graveline, M.D., M.P.H. whose Spacedoc website (he's a medic who was part of the Space Program) has many articles about statin side-effects. Here's his take on Rosuvastatin (aka Crestor)
"We have now learned much more about the side effects of Crestor. We have learned that COGNITIVE, muscle and nerve problems, due to the inevitable impairment of glial cell cholesterol synthesis and mevalonate blockade are only part of the problem. The Crestor side effect potential, that it shares with all other statins, is far more basic than this. Now we have learned that mitochondria are an inevitable target of statins." (emphasis mine)
https://www.spacedoc.com/articles/crestor-side-effects
Here's Drugwatch's take
"Unfortunately, Crestor also comes with a
risk of serious side effects, including MEMORY LOSS,
type 2 diabetes, muscle pain, liver damage and a rare muscle condition called rhabdomyolysis that can lead to kidney failure and death." (emphasis mine)
I'm off for a few days break, so will be largely away from this forum, but others here should be able to answer any queries.
Hope the above isn't a shock, and any choice you make should be an informed one
Be well
Geoff