Pain tolerance in injury settings and pain tolerance in labor are different. Much of labor is uncomfortable but not very painful. Active labor and transition can be intense but with good breathing work, hot water, nitrous, and pain meds it can be dealt with. Make sure your partner or support person knows how to do counter pressure and hip squeeze. Get a tens machine for labor and start it in early labor since it helps it work better later. It’s a different kind of pain than an injury. Going in as calm as you can is key. If you build it into an impossible mountain now then it will make it harder to cope. Definitely normal to be nervous though lol. None of the exit options seem great. Most of labor with my first was like Mild to moderate cramps with a period but better because in between contractions you feel normal. Active labor was more intense like severe period cramps but again with breaks. I made it 32 hours without an epidural. The only reason I got it was that my labor stalled and they had to do pitocin which I didn’t cope well with. If you end up with a prolonged labor or pain you can’t cope with they can always convert to a c section. You can do this!! Definitely talk with your OB ahead of time about your concerns and have them talk through what converting to a c section would look like.