honestly like a bomb has gone off. Looking back I don't know why - but it was. It was like all the things you took for granted, cup of coffee/newspaper/lying down when tired/wearing tight jeans etc etc are suddenly gone.
Also the most love/obsession/joy you will ever feel.
as my sister said to me, you wake up and hear the crying and think "god no, no no" and then you look in the cot/bassinet and your think "oh my god, you are beautiful I love you"
My dh did horrendous call as a doctor and it still didn't prepare us for the lack of sleep.
The best things you can do are:
Talk and sing to your baby from day 1. You will feel like a pratt at the beginning but it is worth it
Don't let a newborn cry - they can't be spoiled at this age.
Lower your standards and your expectations. Wonderful if b-feeding works out but if it doesn't for whatever reason, don't beat yourself up. Every feed your child has is a benefit so if you last for 5 days, 5 weeks, 5 months or 2 years, you are still doing your best. Wonderful if you are up showered and out of the house walking with the pram at 10 every morning. But if you are still in your pjs feeding the baby in front of the tv that is fine too - baby won't care.
This lowering of expectations applies to labour too by the way.
put some dinners in the freezer before hand (I finally copped this one on my third pregnancy and we didn't cook for about a month afterwards)
Make sure dh is pulling his weight. Minding a baby is hard to describe but the thing is you are solely responsible for the life of a newborn when minding them because they can't do anything to keep themselves alive so it is all on you. there is a mental as well as a physical pressure.
Try to mind yourself too.
Accept good help. Bad help is crap but good help is brilliant. My parents came to stay and would hold the baby for me while I slept, make me breakfast/dinner, make sure I had what I needed. It was lovely. My lovely lovely MIL was even better (she came when they left - I had a difficult delivery). She would wait until I had fed baby in the night and then come out of her room and say "Pallisers if you want to go back to sleep right now, I'll settle him and put him in next to you when he falls asleep" I love that woman.