Back pain

I have had this stabbing pain in the lower, right side of my back, for the last week. It's literally like, right above my butt.

I can't walk without taking one step slowly at a time, instead of normal pace, without it feeling like a knife is jabbed in there and wiggling.

I'm fine if I'm laying or sitting down, but the very moment I try to move, walk, get up... It bout makes me wanna cry.

Question is, could this be early labor back pain? I'm 35.4 weeks & I haven't done anything to hurt or strain myself.