A.G.
It sounds like just a phase. But still it can be hard to deal with while you are going through it. If she would rather sleep on the floor then if I were you I would just get a little toddler bed for her or even just a toddler size mattress and put it on the floor or even next to the gate if that is what she likes right now. As long as she is staying in her room and goes to sleep I say let her be. My sister's son kinda did something similar. She finally just took away the crib and got him a little toddler bed. He was much happier after that.