Hi all, does anyone know the explanation for a chest ache sensation, I think it's happening when my t3 dose is wearing off? It's freaking me out a bit. But I'm sure I've discovered a link that it goes away when I take my next dose of thyroid hormones. I'm sure I'm not hyper as my t3 last test was below range and only now back in range. However I know my endo would panic at a chest symptom. Just like they think insomnia would be a hyper symptom but for me insomnia is a definite hypo symptom.