L.P.
Have you ever watched a scary movie and thought, "No, don't go in that room!"
That's kinda what I was thinking when I read your post-lol
I have so been there, and I can tell you from experience that the things you are doing are making it worse. If daddy rubs her back till she falls asleep, she'll want that EVERY NIGHT- bad enough when you just have the one, but when you have a newborn also?! You'll want to rip your hair out.
I highly recommend Dr. Ferber's book!! If at all possible, get it TODAY. Or get it at the library. You don't have much time so don't order it unless you have to. Read it today so you can get your daughter in a good routine before the baby comes (Congratulations, by the way). That book worked miracles for us. Follow it to the letter, and I promise you, it'll be worth it.
http://www.amazon.com/Solve-Your-Childs-Sleep-Problems/dp...
You can read the 1st couple of pages on Amazon, and see the reviews too.
Wish you the best! :)
BTW- some people think the Ferber Method is CIO- it's not- not in the traditional sense.