What time does she go to bed? I found that if I put my son to bed too early, he woke up at about 4AM and refused to go back to bed. His bedtime is 9pm now, even though he's less than 2.
You might try a little solid food right before bed. If she's waking up because she's hungry, it could help her stay asleep. A friend of mine would mix some cereal in with her son's evening bottle, because she said it helped him sleep through the night. Or you could just do a little bit of cereal mixed with hot water or formula right before bed.
When you give her the bottles, does she drink them all? Is she playing with them? Is she maybe only sucking for comfort?
If she's hungry, the cereal or solids before bed might help. If she's needing to suck for comfort, you might try introducing a pacifier. Sometimes they just need that comfort.
If she's playing...you might have to bite the bullet and try letting her cry it out. We battled with my son...it's worse for us because we have a two bedroom house and we use one bedroom as an office, so we're all crowded in one sleeping room. So he can see us laying right there, and see that we're obviously not picking him up. If she has her own room, you might have it a little easier.
Instead of picking her up, try just hugging her while she's still in the crib, and telling her that you love her, but she needs to stay asleep. Then kiss her and leave the room. It will break your heart....after doing that, I sat on the couch and listened to my son scream angrily for 45 minutes before he dropped off. The next night, we repeated this, but he only cried for 30 minutes. Next night it was 50 minutes, and the next night it was 10, then 5, and then he didn't wake up at all.
We got out of the habit of sleeping through the night again when he stayed with grandma and grandpa for a few days. So we had to repeat the process, but it went faster the second time...only two nights of screaming fits.
I hope this helps...of course, there's no wrong way to be a mom, so you can make your own decisions and do what seems best to you. But you have the right to a night of sleep...and if she's not hungry or hurting, a good healthy cry never hurt anyone! (I know, I'm so cruel that way. But I figure, if you're cranky, you can't be at your best with them during the day, right?) I wish you the best!
~J.