I've had the odd braxton hicks, where my belly has gone really tight for a couple of minutes and then eases off, but on Wed night and then on and off during the day yesterday, I was getting period like crampy pains along the bottom of my uterus. Is this another type of Braxton hicks? or is it like my hubby reackons, and because bubs head is down, its the bottom of my uterus stretching?

thanks