Labor?

I'm 36 weeks exactly. At 31 weeks I was checked into the hospital with intense contractions that lasted nearly 24 hours. My baby is going to be a total "back labor". My lower back and hips hurt real bad, I can't get comfortable, I have on/off nausea and I have her movement + irritable uterus twitching. I also have random uterus pains that feel like a period cramp but don't last longer than 30 seconds. I have a lot of discharge and a tiny bit of mucus that I don't think is my mucus plug. Could these be signs of labor again? My doctor said at my last appointment this week that they believe it could be any day now.