I was at the "very easy" end of the spectrum. 48 hours of prelabour which was on and off period type pains, lasting for a few hours every 10-20 mins, then stopping for a few hours. Took paracetamol but never felt I needed anything more. Too uncomfortable to sleep when I got them but had breaks in between.
Actual labour was unmistakable and for me was less than 6 hours. natal hypnotherapy, tens and paracetamol at home for the first 3 hours. Felt a very strong pressure and yes, it did hurt, a good deal more than a period pain , but the thing is it comes as a wave, so you know it will end or at least reduce after it peaks. Was 7cm on arrival at hospital and by then I needed something else for the pain and gas and air worked really well for me. You get to a point that you think you can't cope, this is very often transition, it was for me. The contractions get stronger and closer giving you less of a break, which can be overwhelming and I seriously cannot recommend hypnotherapy enough for coping with this. Crowning is very stingy and a bit scary, I knew I was about to do myself some damage but I had a good midwife who helped me through this bit. As soon as the head is out the relief is phenomenal, and the moment you get to cuddle your baby is indescribable, beautiful and just the most amazing thing you'll ever do in your life. To say its worth it is such an understatement.
I was very lucky. I was also well prepared and had a big background knowledge of childbirth that goes wrong (medical profession). As sensibly said above, dont try to anticipate too much and have a birth plan that allows for all contingencies, rather than just the happy natural birth we all hope for. My birth aim was to come out with a healthy child and a healthy me, the rest didn't matter to me, cs, ventouse, whatever was needed.
Everyone is so different. Genuinely no one can tell you what your labour will be like.
Hth. Very best of luck.