Early signs of labor?

I’m currently at work 35+1 pregnant and I’ve noticed discharge.. the slimy one with no bloody show. It started last night and now I’ve seen some this morning. Could this be my mucous plug stripping away? Also I’m noticing I’m having cramping in my lower back, my thighs and even my vag is a little sore right now.. lol sorry tmi.. does this mean I’m expecting to have my baby soon?