I have acid reflux and it’s been 3weeks of not being able to keep anything down.

I have acid reflux, but it hasn’t really been a big problem up until about a month ago. i figured it’s because i relapsed and kind of back slipped back into my bulimia cause that’s when it started to get bad. i wake up with my throat often burning or a nasty taste in my mouth, im constantly nauseous and take zofran to help but it rarely does, i take Prilosec in the mornings but it seems to wear off and it’s still hard to eat, food has become repulsive and any time i do and try to eat i throw it up and it’s not on purpose. I’ve been living off of ensures and even then that comes back up sometimes. I feel miserable and I don’t know how to help myself anymore. I’ve been to the er thinking it was something else maybe but they said i just need to learn how to manage it. it’s frustrating cause i feel like this is my fault and idk how to help myself.