3 days overdue, cramping bad right now

Melody
Can this mean labor gonna start soon. I was cramping In my lower stomach but able to go back to sleep now it's 2:40 I couldn't go back to sleep because it was hurting a lot. I have heating pad on my back now, feels better. 
Lovely, I feel constipated also so if it is. Guess who will be pooping on the table ?! ...