Lady bug, something which helped me during labour was telling myself over and over in my head "this is temporary, it will be over soon." During contractions the midwives weren't letting me push despite the desperate urge to do so and I kept thinking "just a few more seconds...hold it just a few more seconds" while my midwife was reminding me to breathe. That also helped me, I found.

ETA: and I also remember thinking "well the pain isn't so bad that I want to die or not exist" lol it also helped put things in perspective.