Emotional breakdowns last stretch of prenancy?

I feel completely out of control of my emotions. I feel pretty good today but it's like every couple of days every little thing makes my eyes well up and cry. It's gotten to the point where my husband will come home and I will be sitting there crying at a movie or something and he asks me whats wrong and I tell him I don't even know and we laugh hysterically even though I can't stop the tears from coming. I have been under a lot of emotional stress through out this pregnancy, his ex-wife and attaining three step kids, changes in work and endless doctors appointments for high risk stuff, but I feel like I just can't enjoy this last portion, anyone else just miserable at 36 weeks? For the most part i'm happy go lucky (physically miserable) but I cry at the littlest thing