You could try putting on some music. When my son was that age we had a mobile that projected an animal slide show up on the ceiling and played music at the same time. Every night he fell asleep with that no problems plus it comes with a remote so if it shuts off you can use the remote to turn it back on instead of walking into the room. I think maybe if you try the mobile it will distract her and make her less likely to scream. I actually got it from walmart and it was $40 but its was the best investment we made because it made for easy times of putting my son to sleep. Plus it just attaches up on the side of the crib it has 3 different sound buttons for music, heartbeat, or jungle sounds so at the same time she can push the buttons herself to change the sounds.