Here's the Thing

I have this issue called emetophobia. It's annoying and it runs/ruins my life to an extent. You didn't know this??? Oh boy! It's horrible and I hate it and hate myself for it. I don't exactly know where it came from but I have my theories. I've been giving it a lot of prayer and also some research and I just don't know what to do about it. Everytime one of my kids complains about a tummy ache or doesn't eat well or doesn't do his/her big duties in the bathroom as often as I would hope or if they do and it's not very good I start freaking out!!! I give my kids Berry Well and SuperKids vitamins every night before bed and I really do think that it helps keep "bugs" away or if they do get sick, not endure near as long as it normally would. I have noticed a difference from last year when I wasn't giving them anything. They had colds every 3 weeks it seems and so far they haven't had a full-blown cold all winter. This fear is also why I am such a fiber freak and healthy food freak and don't let my kids eat very much sugar, candy, cake, ice cream, dairy (except for Yoplait YoPlus yogurt), crackers, cookies, or bacon or ham, etc., because I am afraid if they have too much "bad stuff" in their systems it will cause a tummy ache or if it's not fibrous enough it will cause constipation and then, you guessed it! Vomiting! What should I do because this fear is completely irrational?! Any advice would be helpful........I hope!