Hello there nyxy, welcome to the forum!
You're certainly not alone! I think we all fear stomach viruses more than any ordinary kind of v*, probably because they're so contagious, if you're not careful. Yep, your reactions sound very much like alot of us here - just freezing up when someone nearby is feeling ill, and not daring to breathe until you're a safe distance away from them.
I'm not sure if there's a more specific phobia for stomach viruses in particular...but just know there are many, many others here just like you - and also, there are lots of mothers around here, so if you need someone to confide in, there are plenty of understanding people here in the same situation ^_^
Hope to see you around! Sorry I coudn't help with your question!
\"We are all in the gutter, but some of us are looking at the stars..\"