With my own children I had a nightly routine of stories and songs and then I darkened the room and tucked them in and sang a few songs while I sat on each child's bed and rubbed their forehead or back and made sure they were relaxed. I was very strict and stern with them about getting out of bed for anything except to pee. Use consequences for your daughter's screaming by removing privileges, etc. whatever you use for discipline. Don't let her continue or believe me she will only get worse. She's playing you like a finely tuned instrument and it's up to you to put a stop to it. I know it isn't easy, it takes a lot of time and patience and consistencey. my youngest daughter was a special little monster so I completely understand what you are saying.