ahhhh ok thanks all. That has cleared things up for me.
I had absolutely no idea what they were, felt like or if I should/shouldnt be getting them. The books I have just said it feels like a contraction, but I dont know what that feels like, lol!

Anyway, I asked because I sometimes (not particularly often) feel my entire belly go rock hard. It doesnt hurt at all, it is just very very firm all over and can feel uncomfortable esp if I am sitting with a bit of a slouch. It also starts lower and goes higher till the very top of my bump is also solid feeling. It doesnt last particularly long before my belly goes softer again - maybe 30 seconds or so.

Is that what it is, or does that sound more like bub poking its bum out or turning over?

Just curious as to what is going on in there sometimes!