when i were you i only started thinking about it during 3rd trimester . Then i keep asking pple what kinda pain is it hah etc.
no need to worry so much, if cannot bear the pain just take epi. My gfs have all said ok.
labour time depends on individual. Some take only 1-2 hours, some take as long as 16hours (me ) and some chop chop 20mins. So really depends on individual. Normally 1st timer will be slower in general - as far as i know of.
Contractions are most unbearable during 6cm to 8cm dilation, which lasted around 20 to 30mins for me. After that is pushing time - no pains already!!!
dont worry you will be strong at that moment due to our natural mother instinct, we will try all we can to deliver our own precious baby, so no need to worry!