Finding it so hard to know if I'm actually having contractions or not, varied in length from 30-50 seconds every 3-4 minutes but have only just woken me up so could have been going on a bit longer, currently only been going on for 30 mins ish. It feels like a wave coming and my uterus goes hard, pain mostly lower down. Then goes. But no back pain which I've read most people get? Ahhhh! Any ideas please?