Just about to have my second, and this is reminding me of so many of the things I'd forgotten about!
Afterpains - no had warned me they could be so brutal. If you are breastfeeding, they will often come on while you are feeding, or just after, and a few had me doubled up in serious agony, unable to move. They do pass, though, and I only remember a couple feeling that awful.
Witchhazel liberally applied to a maternity pad to soothe things down down there. Helped me in the first few days. Also, you might not bleed as much as people are warning you. It calmed down for me after about a week and then tailed off.
On top of being all swollen down below (I pushed for 2 hours, so I think it might be related to how long you are pushing for), I found it really difficult to pee for the first 24 hours or so. I did also have an epidural, so this might have been the issue too. I would head to the loo, and pray that I could relax enough to let go and actually pee. I even had to have an in and out catheter at one point, as I was panicking that I couldn't properly empty things. It did get better quite quickly, though, so don't despair!
Oh, and for the first 12 hours or so after being born, your baby will probably keep coughing up mucus, which can sound alarming, but is totally fine. Was a bit worried until a midwife came and reassured me he was fine.
No matter what people say, breastfeeding can and does hurt, even if you are doing it right. I ended up with cracked, bleeding nipples for a while, even though every time my DS's latch was checked, it was pronounced absolutely fine. I don't know if all the midwife's were talking rubbish, but by all accounts, my DS was feeding perfectly, and I still ended up in agony. Lansinoh is your friend - apply liberally after feeds. Pump a bit if you need to give one side a rest to heal. Keep going through the difficult bits if you can; it should get a lot easier week by week, until by about 6 weeks, all the hard bits are mostly forgotten. Get any and all support you can, as this helps.
Oh, and another thing that I've hardly heard mentioned anywhere, was to do with mood changes whilst breastfeeding. All the books go on about what an amazing experience it is and how it helps to bond - I found the opposite. Every time my son latched on, I would get this overwhelming sense of despair wash over me. I thought I was going mad, until a friend mentioned that the same had happened to her. It's called Dysphoric Milk Ejection Reflex, and is controlled by your hormones (something to do with a drop in dopamine). Mine got better over time, but I did feel like I was going mad until I found out what it was.
Phew, seems it's all coming back to me!