I know what you mean with my first I had no idea I was in labour I just thought I had to do no2's and I was getting tummy cramps a bit like wind, I kept going to the loo but nothing hapend! I had been getting them on and off for a few days but didn't realise till I looked back and thought how silly was I! I rang the hospy at about 3am just to get some advice and they told me to come in, I still didn't think I was in labour until they monitored me and said yep they're contractions well no wonder they hurt so much!! good luck and I hope it establishes for you