Around this time we stopped feeding DS in the night. He was having about 2 or 3 bottles a night as he wouldn't go back to sleep without it (we stopped BF at 12 months ish).
You need to break the association between sleep and feeding, but in a gentle way that doesn't involve you abandoning her. If you are pregnant, the time might be right.
With DS, who was 17 mths, we would pick him up cuddle and then put down, repeating until he was relaxed enough to lie down , and then sit down with him next to the cot with a hand on his tummy. He very quickly forgot that he needed milk to sleep - took about an hour the first night, similar the second, 15 mins the third.
He's 18.5 months now and actually has been sleeping through, or just waking briefly once, for the last couple of weeks. He settles himself to sleep (we have a story, milk in a cup, a cuddle and a song and then he goes in his cot and blows me a kiss good night!)
The transformation from 6 weeks ago is amazing really. In terms of the whole bedtime settling and nightwaking thing he seems to have gone from baby to boy very quickly. He has started eating about twice as much in the day too, as he is now no longer having loads of milk overnight.
Good luck. It won't be easy but you don't need to leave her screaming. There are gentler ways as I outlined above.