T.S.
Sounds like she may be teething? her 2 yr molars perhaps? My 2 yr old went through something similar at around 18 -24 months. After sleeping well for the longest time she started getting up constantly throughout the night. I am now 9 months pregnant and was exhausted then at 7 months pregnant. But after one day when she was laughing, I noticed 2 of her molars had come in and that clued me in to what it must be keeping her up. Now that they are all in she is sleeping soundly through the night again. As for the bottle, if she is teething and in pain sometimes they go for a comfort thing like a bottle to make them feel relaxed. But I have read that the sucking motion is painful when teething. Good luck. I hope you get some sleep filled nights soon.