Stop rocking her, bringing her into your room, and sleeping on the floor. They all give her attention with your presence, and contribute to keeping her awake. "I can't get her to go back to sleep". No, you can't, but she can, if you let her. You're rewarding her with your attention, so stop. When she wakes up, look at the clock, and give her 5 minutes before you go in. Then don't talk, don't pick her up, and don't turn on the light. It's nighttime, so shush her til she calms, then leave. Next time she fusses, give her 10 minutes, then soothe her quietly and leave. Then 15 minutes. She will eventually fall asleep waiting for you. Try a little motrin or tylenol at bedtime for a few nights to see if teething or something else might be waking her. If she had good sleep habits, this is surely temporary, so don't turn it into "facetime with Mommy".