Jas - it hurts! LOL. but... you get a break between contractions to compose yourself (albeit only a minute or so towards the end of 1st stage!). I found myself breathing through the contractions waiting for it to peak and start fading away. Knowing that it's going to fade keeps you going most definitely.

And don't forget that the body produces wonderful hormones that help you to cope! It still makes me laugh that a few weeks later I was just 'dying' with a headache and NEEDED panadol. LOL. I had just done a drug-free birth... but couldn't handle a headache?? If only we had those hormones and natural painkillers all the time

All the best with your labour, I hope it all goes smoothly for you