Things that no one warned me about:
Your bladder getting too full and not emptying can cause you to get stuck in the latent labour phase. I was in that stage for three full days, with contractions coming every few minutes for an hour or two and then stopping completely. I showed up at the hospital on day 4 sobbing and desperate for help, they emptied my bladder and baby was born less than 12 hours later.
Cluster feeding. There will be nights when if you're breast feeding, baby will basically be clamped to you. For hours. I think our record so far is 7 1/2 hours of feeds with no more than a 20 minute sleep in between. Be kind to yourself during this time. It will pass.
While we're on the subject of feeding, breastfeeding hurts initially. The first few pulls on the breast can be toe curlingly painful. However if you get any odd lumps, excessive pain, or your breast becomes very red and inflamed, see your midwife or Gp immediately. Mastitis is a bitch and you will need antibiotics. You will also need to keep feeding on the affected breast which will be possibly the most painful thing you've ever done. And yes, you gave birth recently.
Breastfed babies still need to be winded. Found that out the hard way when my day old baby had a total meltdown.
Night sweats. They're horrible. Be prepared to change your bedding a lot. Baby is 3 weeks old now, and they seem to be easing finally.
Everyone will tell you to enjoy your baby. It's ok sometimes if you don't. It's bloody hard work, and terrifying a lot of the time too. Sometimes you just have to get through it. And that's ok.