That's sounds rough. I hope it improves soon for you. My children both go to bed with a pop top water. That is there drink in the night they don't need to wake me to drink it. I would tell her for a few nights what's going to happen. Now that your a big girl you will be able to have a special water bottle ....... Something like that after a few days of explanation I'd then implement and maybe a reward chart. I think you said she is 3 star charts can be quite good my 3 yr old dd has also recently just started to stay in her bed all night by doing the same. Hope it gets better for u