Boy, it is interesting to read this. I come from a family where most of us are afraid to vomit. Weird.
Personally, I have had this fear since 10 years old. I went from the age of ten until I was 39 without ever vomiting. At 39 I did, and I was shocked. It was not as big of a deal as I had made it out to be over all those years. Now, I don't have the fear of vomiting, but I do still have a fear of nausea, gagging and choking. Vomiting by itself is actually "easy" and less uncomfortable than everything that proceeds it.