That's where seabands come in. They are bands you wear on your wrist and just because of how they fit and the little peg inside, it can make you feel better very shortly after putting them on. It's suggested that you wear them continously when you feel ill or would have normally. There is no limit, they are non-medicated so you don't have to worry about who you are, or what or why you have symptoms. They are child friendly as well.
You should really check out sea bands because they can help you in many many situations. Change your eye color to look like you're sick, with green contacts! Or maybe just get scary with vampire contacts?