hello,
i also have fear of vomiting and im always worried im gonna be sick, i always worry am i eating too much or too little, will i be sick because im hungry or will i be sick because i ate too much... its so ehxhausting, as you probably know yourself, too.
and when im home alone or at work and when start having panic attack, first thing i start worrying about is im gonna be sick, that im gonna vomit, and i dont know what im gonna be doing then.
stupid things is, ill probably survive it if it happens, but realistic thinking is not always there when you;re in the middle of the panic attack, right...
so, if its of any help, im dealing with the same problems, im just much older (29).