D..
Put her in the crib. Sit on the floor beside the crib, and put your hand through the slats and stroke her leg. She will still cry, but she will know that you are there. She will eventually cry herself to sleep. Leave the room. She'll probably wake up in the middle of the night. Do the same thing. Don't talk to her, don't pick her up. Don't feed her until 5:00 am.
What you are having to do is teach her to self-soothe. She hasn't had to do it before, and it's hard. It will be hard for you too because you won't get much sleep for a while. But the payoff is that she eventually will stop waking often, and you will stop going in. She will cry for a while and then stop. And then she will stop waking up. And you will all have some good sleep.
Be 100% consistent, or don't do it at all. 100% consistent means no picking her up and no talking to her, period.
Good luck,
Dawn