How on earth do you tell?! This isn't even my first I just can't remember. I've been having tightenings for over 2 hours, anything from 5 to 10 mins apart but not always equally spaced if that makes sense. Lost a lot of what I assume was plug at about 9.30 this morning but not bloody show or anything but these tightening since. I know only time will really tell but I want to know if this is it so badly haha.