I have no idea what i'm doing up right now, but i had woken up at 1:30 AM & got a dull pain/uncomfortness in my lower back. Anyways my stomach started hardening and tightening very frequently, I decided to time them. So far i've got them about 5 mins apart but lasting from 30 seconds to almost a min. My water hasn't broke from what i know, right now i'm drinking water to single out that that my stomach is hardening & tightening maybe because i'm dehydrated but so far no change. Should i be worrying? what should i do?