Justmuddling, hello, I am an old Mner, not usually here, and never post on these emetophobe threads, but I do read them as I am a very bad emetophobe, just like all of you here.
Sometimes, when lurking on MN, I can't resist reading the emetophobe thread if it is active, and so it was I came to it today. As no-one else has replied to your message this evening yet, I feel I have to offer you a supporting hand.
Try to stay calm, sweetie. You have been through a dreadful 2 days and you have done brilliantly on your own with 2 sick children. It would have been virtually impossible to avoid such a bug yourself, in such circumstances. But you don't have to be sick. Try to breathe slowly and deeply, try to be as calm as you can, and hopefully you will avoid the worst. I have never been sick as a result of catching my children's bugs - always managed to just have diarrhoea. Put something on the tv/radio to try and distract you from thinking about it.
And, I don't know how old your children are, or if they know about your phobia, but I could never hide my fear from my children so I have always been quite honest with them about it. Tell your children Mummy will be ok, you are just very scared of being sick, but you are a silly Mummy as there is nothing really to be scared of, it is just the way you are (or words that you will think appropriate - that is roughly what I have told mine as I didn't want them to think being sick was anything to be scared of, I didn't want them picking up my phobia).
Thinking of you sweetie.