I booked a home birth, but didn't write a birth plan at all. I decided that, so long as the baby and I were ok, I wanted to play things by ear, so to speak. I was prepared to take advice, etc., from the midwives as and when they saw fit.
I was really lucky and it all went well. No pain relief, DD born at home. It was lovely.
Once I was in labour, and contractions had begun, I got through each one by "remembering" the pain of rowing. I used to row at college, and racing hurt. A lot. Legs, back, arms, hands, arse, lungs. Everything. All agony. And for what? To try to bump some dumb boat in front! Turned out it was a really useful mental image for me. As each contraction came and went, I thought: "ok, get through this one", just as I'd tried to take each stroke in rowing at a time - "Push for 10!", and all that! I was lucky, I guess, that I never found the contractions getting worse than the pain I'd felt when rowing. When I got to the pushing stage of labour, and it was really painful, well, by then it was too late to worry about anything and DD was born 20 mins later. The feeling of having the baby pop & slither out is amazing! Relief!
So, rambling now, but I guess what I'm saying is, if you have any experience of a painful sport or some other physically painful experience, you can draw on that and remind yourself that you got through it before, so maybe you can do it again!
Good luck!!!!