Is this early labor?

I'm due tomorrow. I've been losing my plug over the past few days but its mainly been green, today I got the bloody show and its been slowly coming out all day. Since about 9am this morning I've had menstrual like cramps and they've been getting more intense, but I don't feel it in my back and my stomach doesn't really get tight. I have also gone number 2 a lot today and I never do. But the cramps are about ten minutes apart lasting 30 seconds or so. Is this early contractions or is it just cramping from the plug??