Haven't been here in a while but I can add my 2 cents.

I was diagnosed with Graves' disease (hyperthyroid) in 2003. It went knit remission for a long time. Diagnosed bp in 2012. Then found out about 6 months ago the graves was back. I had a total thyroidectomy and everyone hoped that maybe I wasn't bp. But I can tell you that not much has changed for me emotionally.

I think that it can mimic mental disorders but I also think that there are differences in the mental issues caused by thyroid versus true mental disorder. I am less irritable overall now. But still have swings of depression and Hypomania. I think my swings are less severe but it also could be the increase and change of meds due it my anxiety getting so bad.

Best way to tell is get your levels checked. Also remember that even if they are normal, if they aren't normal for you, you will feel like crap. Hypo or hyper.

I also think that the physical crappiness felt is different from hyper versus bp. I can't really explain it but since becoming euthyroid I still get crappy feeling when depressed just......different than before.

Point is, it takes a freakin army to diagnosis and treat you but only
YOU know what feels right. Even on a good day I'll still feel off sometimes. And even if you're powerless to stop it, you know it's not right.

Good luck!!!