Thyroid produces hormones which directly effect all other hormones - especially estrogen. Yes, it could be hormonal.
That sounds very similar to mine. My nodule has been removed though so I don't know what could be compressing down on a nerve. I do find it interesting though that my nodule was on my left side and all my pangs, tingles and such are on my left side too.
I don't know if this is related but.....I have a nodule that I believe is compressing a nerve(s). One nerve runs up to my larynx and the other runs down to my left breast. It tingles and I get a dull ache, creepy feeling, on the breast and to the nipple. The nerve is near the surface, below my collarbone, as I can press on it sometimes and duplicate the sensation. It could be a nerve causing you those symptoms.