Since becoming hypothyroid I have suffered from absolutely terrible PMS, to the point where I think it is actually PMDD. In addition to the usual PMS symptoms, for an entire week I hate literally everyone and can't stand being around people. I'm also usually exhausted and can't concentrate on anything. I tend to get depressed too. It really affects my social life as for the week before my period I don't make plans to see anyone as I can't face being around others. It also gets me into trouble at work because I am so irritable with people.
Nearly 4 weeks ago, I added T3 to my levothyroxine. I just started my period and while I did experience some typical PMS symptoms for the past week (dramatically increased appetite, chocolate/junk food cravings, cramps and bloating) my mood has been wonderful, I've been out socially and seen friends in public places and it hasn't bothered me at all to be around people. In fact it has made me feel very happy to be around people! I have been in such a good mood, I'm genuinely amazed!