How nice to read this thread - I brought up the subject (so to speak) a couple of years ago, but didn't really get too much feedback.
I too have emetophobia - of other people throwing up, not myself. One thing I have noticed is that it gets much, much worse when I'm slightly depressed. But even when it's not bad, there's not a night when I don't go to bed and consider the possibility of one of the kids waking up and being sick in the middle of the night (which is invariably when it happens with ds1, but not, so far, with ds2). dp is away tonight, so no doubt I'll be extra on edge.
I contacted Triumph over Phobia, too, and ended up going to a local group for a few months, but it wasn't very successful because, as has been pointed out, there are no easy steps towards exposing yourself to somebody throwing up. Also, the person running the "group" - there were only two of us went! - didn't have any experience of phobias and was doing it as a voluntary part of her studies in psychology. I looked at some photos and got as far as watching a video made by the Maudesley, which was really traumatic at first, but then not as bad after the seventh time of viewing - deeply unpleasant, but not traumatic any more. But how to move from a picture on the screen, which is predictable and once removed from reality, to real life, which is not at all predictable. The worst words I can hear are: "I don't feel well" or "I feel sick". They say it so lightly! In reality, people don't often go on to throw up straight away, but the damage is done to me. My nerves jangle, my stomach is in knots, my adrenalin levels shoot up and I spend the next period of time working out how I can make myself scarce. It's got so that it's almost the first thing I tell people about myself now (even before I come out to them!) just in case they ever feel ill and want me to look after them! I remember when I was young, if I was ever sick one of my parents would rub my back for me. I just wish I could ever think of doing the same for my ds's. What has happened up until now is I send dp in to deal with the throwing up child and then I do the clearing up.
It's a phobia that interferes in so many areas of life, though. I won't go on coaches or ferries, don't like to be around people drinking and am constantly - many times a day - imagining what I would do if either ds threw up right now. Still, it does me good to know there are others out there, and I'm even more determined to try out hypnotherapy. I have a leaflet for someone in south Manchester, but I haven't contacted her so far because I think it'll be too expensive. Also, I suspect, being a pessimist, that I'll never really be cured. I can't imagine seeing or being near somebody vomiting ever not being the worst thing in the world.