I've only skimmed the thread so can't say whether I'm repeating a lot of what's been said but although I remember the pain being all consuming & requiring effort to deal with/get through, I honestly don't remember how painful it was - on a scale of 1 to 10th say, I would guess it was 10, but equally I had an encapsulated appendicitus and had agonizing stomach pains for 2wks, & that was almost harder to deal with.
I also had quite a short labour (show to baby in 12hrs) and whilst the contractions were around for about 10hrs, they were only really regular & hard work for about 6hrs before DD arrived. The pushing was more physically exhausting for me, and don't remember the crowning being much more than stinging a bit. But then DD is 2.3yo so maybe my brain is helping me out? I'm sure I would have felt differently if I had been in labour for days...
To cope, I paced or rocked in a crouched/all fours position. I then spent some time in the bath, when I literally splashed up and down breathing through the pains and visualizing waves sweeping in and out with each breath, as someone had suggesting imagining surfers on the waves of the pain. I had G&A for the pushing stage, although I think that was a bit pointless now - a better birthing position would have helped more by that point!!
I didn't do any classes etc for breathing techniques, but for #2, I'm doing an NCT class & hoping for a water birth, so I can avoid the G&A this time, as I didn't like the sensation. I kept my options open & wouldn't have ruled out any pain relief before DD, but I genuinely found the pain manageable - yes it was strong, all encompassing, exhausting, but it came in waves, & I focussed on each wave and rested between. Each one was an individual pain, & not part of a long process, so I didn't dwell too much on what was happening in the next hour or two, just what happened now. Having a good birthing partner helped too, so I could literally just focus on me.
Good luck OP. It might be the worst pain of your life (but epidurals, pethidine are options if you need them) or it might be better than you imagined. Until you're there, you just don't know. Arm yourself with a good birthing partner, good techniques/visualizations and take it one contraction at a time...