i was thinking about posting a similar thread!
i also thought i'd be fine this time since i've birthed before, but i think i'm actually more apprehensive the second time around.
as far as labor support, have you talked with your husband about what you need? was he pretty helpful last time? if you are not both really confident that he will be enough support, i'd second looking into a doula. i know they are expensive, but some cities have volunteer doula organizations where you can get a doula for free or much cheaper than usual.
as far as sleep, your body can do amazing things, and not just talking about giving birth. you can function on so much less sleep than you think you need. take the naps you can get, but if you can't get them, you will still manage. we are built to birth and care for our babies in all sorts of circumstances. and if you get exhausted during labor your body may just take a break and then start back up.
with dd i was a "high risk" pregnancy, and ended up induced, so i was too busy thinking about all that to think much ahead of time about labor itself or the realities of having a newborn. i think i also just sortof checked out once i found out i was having an induction...it was a disappointment, and i felt a bit disconnected from the birth.
this time, with midwives instead of ob's, and no risks, and a birth that will happen in its own time, i feel a lot more nervous. even though this is the way i want.
part of it is being alone until 39 weeks. i've got a lot of worries centered around what would happen if i went into labor before then and didn't have someone to watch dd or any labor support.
but i'm also apprehensive about pain management. last time after 20 hours laboring flat in bed (i had a broken i.v. tree so i couldn't walk around, and was on a constant monitor for my BP and baby's heart, and had my water broken and was leaking everywhere), i had an epidural. the pain of laboring with a posterior baby, laying still, was awful to the point where i was so tense from it that i couldn't dilate even with the pitocin at 22. it was a really really hellish pain, and once i couldn't feel it i dilated 8cm in 2 hours, but getting the epidural still felt like failure. i know this time with the ability to move around and use the ball and stool and tub it will not be nearly as bad, and it will be natural rather than pitocin contractions. but i think it's just the fear of the unknown....and the fear that i'll not be able to handle it again and end up having to transfer from the birth center to the hospital for an epidural. the fear of feeling like i've failed again.
i think the closer i get to this birth the more of the feelings from my first birth are coming up. i cried every time i thought about it for like the first year after, and now i just don't think about it, but the feelings are still there and not dealing with them is making me worry. i really don't want this birth colored by the last one.
i want this birth to be the empowering experience that i hear mamas talk about, just not sure how to get there.