A.O.
It might be a little too early but keep encouraging her and let her set her own pace as time goes by. Looks like she is headed in the right direction! I do know that girls are easier to potty train (in general-not always) than boys so I would say that it is probably time for Pull Ups. My boy (almost 22 months) is taking off his diaper and pooping on the floor. He doesn't understand the going on the potty concept thing yet although I have one in each room for him to use. right now I am duct taping the tabs of his diapers so he can't pull them off. That your daughter is telling you when she has to go and sitting on the toilet is great, even though she isn't actually going in the toilet. That is the component we are missing over here. I think you will have great success!