Welcome to BW. Huge {{{hugs}}}
Firstly, please do not let her cry it out. Here on BW we do not condone CIO at all, as Tracy Hogg was firmly against it. There are much more gentler ways of helping her sleep. Have you read any of the BW books?
Is her reflux medicated and under control?
What does her day look like, if you could please list it in EAS form, that would be great, for example
E - 7am (how much?)
A - solids? When, how much?, other activities
S - 9-11am
E - 11am (how much?)
etc..
What happens at night wakings. Have you tried to settle without the feed?