I TGI k the majority of women def know when they are in labour. It wasn't even just the contractions (mine were all in my hips, I desperately wanted to walk through them as it had helped but then had to be monitored through the remainder of my labour - horrific). But when you are in labour I felt it was quite a mind blowing experience, something else comes over you. I cried in pain, but for me I felt kinda out of body and a bit in awe/shock.
Good luck it is truly amazing and I cannot wait to go through it all again - meeting my precious boy for the first time was immense - I will never get over that
Xx