Oh my goodness I'm so sorry this is happening...
When you did v*, did you feel your emetophobia loosen a little? Maybe even in the slightest bit? As in did you feel that thought of "ok it isn't as bad" because I know most of us meets are like that. If you did...maybe you could try and explain it to your daughter that it's ok to feel this way and that it's never as bad as you expect it to be. Also have you tried getting her to drink things other than water? That may help kids want to drink more if it's drinks such as apple juice or maybe even a little bit of gatorade. I'm not sure if this helped but I really hope things will work out for you guys <3 sending lots and lots of love...from a guy who cares ALOT about hygiene haha stay safe!