Could this be signs of early labor?!

I'll be 33 weeks Saturday. All day today since I've woken up, I have had terrible, almost unbearable back pain. Like where it hurts to move in general. And when I stand up I feel soooo much pressure in my vagina and butt hole. It kind of feel like I'm having intense period cramps. Just got off work and came straight to the bed because I just can't bear to stand or sit. Could this be early labor signs or just me being a pansy?! (FTM if you couldn't already tell)