Sleep:
Im not sure if this is much of a suggestion, since you just switched her to formula...plus its kind of controversial to some, but I just thought I would share what I did to switch my babies nights and days around from the time they came home.
Because I nursed for over a year w/ my son and over 2 yrs with my daughter, this was fairly simple.
I slept with my children. (That was key number one) For me, I kept my little one in the nook of my arm. That way I was sure not to roll over onto them. -Maybe a little uncomfortable, but just like you get used to not sleeping on your tummy when your pregnant, it wasn't that big of a deal. -With them on my arm I could feel the first little wiggles they would make prior to waking up completely. So, before they could wake, I latched them on so that they could nurse, because thats always what they wanted in the night.
As far as diaper changes, I became very skilled at changing w/one hand while they laid and nursed, with all my products pretty much in bed with me. (We had a king sized bed)
Im sure, if you even want to try sleeping w/your baby, you could come up with some teamwork between you and your husband to heat up a bottle or two. -The point is, as soon as they wiggle, try to get it in their mouth asap! :0) It saved me a ton of sleep at night, I bonded beautifully with my children...and fear not, my now three and six year olds are in their own beds.