3rd trim: worst mood swings?

Kit
I had like 3 bouts of crying during the 1st trimester. Was fine during the second. Now (I'm 31w) I feel like I'm off balance, emotionally, in a way I havent been this entire Pregnancy. Im sure some of it has to do with being physically uncomfortable but I'm just more prone to getting down or angry all of a sudden. Anyone else get the moodiest towards the end?