Poor Bluemoon, you sound as down as me right now. I, too, am not sure what to say to help as I know that nothing much helps me. I feel like a prisoner trapped inside my mind and I don't believe I will ever be free. I just hope that one day it won't matter too much.
Anyway, if I can try to console you, I would like you to know that my children eat better for my dh (or grandparents) than they do for me, but I don't think that is because of my problems translating to them but because I am the familiar figure which children always feel they can play up with. TBH, I think my children are a bit scared of their grandparents and even their father is a bit of a distant figure so they behave better for them. Perhaps your dd is picking up the wrong signals from you, but she is also at that awkward age where she tests her boundaries, so I don't think you can blame yourself entirely.
Also, and this is for Mumtochloe and you other mums out there who have been worrying that your children will grow up with the same phobia as you, I once had a colleague who told me her mother had had emetophobia and had always found it hard to cope when her children were ill. However, the daughter (my colleague) had not grown up with it and actually, had coped by herself (from necessity) from a young age. It sounds like your dds are doing the same.
I don't know how my children will feel about being sick when they are older. They seem fairly calm about it at the moment, but maybe that is because my fear and panic overwhelms any reaction they may have. My ds1 (aged 8)mentioned something about sick the other day and I said, "Please don't talk about it, you know I don't like it" and he just said, in a sympathetic, rather grown-up tone, "I know".
I wish I could help more Bluemoon, but I don't know how to. Keep talking to us though, and I hope you will keep listening to my sad ramblings.