Honestly Nat I've been having exactly the same sorts of fears over bonding and the practicalities of managing DD, the dog, and a baby. I've laid awake at night agonising over how on earth I'll wash a muddy dog if the baby needs feeding at the same time and various other scenarios.
I see lots of other people cope easily with a whole lot more, but I don't think I'm a great juggler. I get stressed very easily whereas other people just seem to take everything in their stride.
First time round it all felt so exciting and worry-free, I just thought - with a ratio of one adult to one baby - how hard can it be?
Even preparing practically for this baby has been harder; last time I was completely up-to-date with all my admin, the house was gleaming and I'd read loads about birth etc. This time, no sooner have I tidied up, the house is messy again and there is another load of washing to do...