During labor and immediately after I threw up a few times- I hadn't eaten in over 18 hours so it wasn't like there was anything in there but it still happened. I was SUPER hot (and not feverish), my L&D room was so cold everyone was wearing sweaters in June and I was still sweating.
Post delivery I was thirsty ALL THE TIME- I felt like a camel. I was also extremely constipated from the constant pain medication so be prepared to take some stool softeners (my nurse offered them to me un-solicited and it wasn't until then that I realized I had been a few days without any 'movement').
The first few times you BF (if you choose to) you will more than likely get some intense uterine cramps, pretty soon after LO latches on. That threw me off guard, but it's a good thing, just uncomfortable at first.
Don't assume you know everything and blow off the nurses suggestions, I tried to talk them into letting me go home a day early because the room was so cramped, DH didn't sleep, I was uncomfortable and I just KNEW everything would be better at home. They talked me into staying and that night we realized DD couldn't latch well and was up crying all night, had to call the lactation consultant, no sleep- rough. One nurse almost had an 'I told you so' mentality which didn't sit well with me, but they were right. Take all the help/suggestions they offer, even if you you try it your way first- they know what they're talking about.