M.B.
My daughter was potty trained even at night by 24 months. She did what you are saying your daughter is doing. One day she just out of the blue said I go tee tee mommy. We rushed to the bathroom but she had already gone. I praised her anyway. I kept letting her go when she wanted to but I also started limiting her drinks. (I let her have what she wanted but I didn't let her walk around with a cup) When she would get something to drink I would take her 10 min. later. I would also take her potty every 30 min or so even if she hadn't had a cup. We did this for about a week and she was trained. It seems like a lot but it isn't. It works best if you can stay home for a couple of days, but if not just make sure you take her before you leave home and as soon as you get to where you are going. Good luck!