I'm so sorry your having to deal with this. My daughter started doing the same thing at about 18 months so I have felt your pain. I did what you did. I'd go into her room, reassure her and wait for her to go back to sleep. The minute I'd leave her room, she was right back up, calling out "Mama! Mama!" So I'd bring her to bed with me. At first it seemed to work, but there were issues. She feels the need to sleep with her head in my back and her feet in Daddy's back or his neck. We have a pillow top matress set and even though, the bed frame is as low to the floor as it will go, the bed sits up high. She's fallen out of our bed twice and was very unhappy about it both times. Sometimes she would wake up before Daddy and I, safely climb down from the bed, and proceeded to remove all our clothes from the bottom dresser drawers, or dump all the jewely out of my jewel box, and generally just run amock until her father or I woke up and stopped her. We decided that she has to learn to sleep in her own bed. Now when she wakes up in the middle of the night we go in her room, comfort her, make sure she's okay, make sure she has her pacifier, tell her it's time to sleep, and go back to our own bed and let it be. On occasion she'll cry or wimper a bit, but she usually will go to sleep in short order (5-15 minutes) and stay asleep for the rest of the night. At first she'd get so mad and cry and scream "Mama! Mama!" It was like for torture for all of us. But I stuck to my guns (my husband and I both had to talk each other out of bringing her to our bed more than once) and now the torture seems to have ended. From time to time we have one of those nights where she wakes up screaming it seems every hour on the hour, but fortunately, they are few and far between. It's not easy, but stick to your guns and it'll work out. Good luck and God bless you.