You sound like you are handling your phobia very well. I am in college for secondary teaching (high school kids are less likely to get sick in class ) which is why I chose secondary. If it was me in your position I would have been hyperventilating and made myself sick. It is an unfortunate phobia to have but it could always be worse. It sounds like your co-workers and students are supportive, just remember you look at your phobia as a flaw and everyone has them but your students and co-workers aren't going to label you. Everything else you do to help them is what they will remember.