Back and lower stomach pain that comes and goes? That sounds like contractions to me, it could be false labor, but it could be real labor, if it continues, and the pain comes and goes, time it, if they come and go and are getting closer and closer call your OB/midwife, and get checked! Good luck!
I've been getting the empty stomach feeling a lot even after I just ate. I don't know what causes it, or even why, but I'm asking my doctor about it tomorrow. The back pain and lower stomach pain could be braxton hicks. Are they frequent? Or do they go away if you get up and move?