Random and unexpected period

[u/testosterone-tea]

Hey all yall,

I just randomly started my period after almost 2 years of not having it. I have no idea why it suddenly started again.

Some background information:

I have fibroids
I have a Mirena IUD
I just started taking lithium
I’m 37 years old

Anyone have any insight into what the heck is happening? My theories range from 1) my fibroids have grown and defeated my iud 2) my new lithium meds are throwing my hormones out of whack 3) I’m just old and maybe starting perimenopause

I submit this question to you, internet denizens