I weaned my son from breastmilk to formula at 9 months (because he was giving all kinds of cues that he was ready to give up nursing and I had to go back to work) and at the same time I cut off all nighttime feedings. He accepted formula very well, but the first 5 nights or so were really hard. He just screamed and screamed because he wanted to eat - I think he would have been fine with breast or bottle, but I didn't give him either. You said she screams until you give in - don't give in, take her into another room so your husband can sleep, and comfort her in other ways - rock, sing, whatever she likes. Eventually, she will give up and go to sleep. She may wake up again and cry some more - they will be long nights for the both of you but in the end you'll be glad you did it. I hope this helps. Take care!