Oh no, 3. I also have a fear of vomiting . . . gross. In fact, whenever my kids have thrown up in the past (which thankfully hasn't been very often - knocking on wood!) I would hand them over to my H and he would take care of the clean up.
I hope nobody else gets it, especially you! When anyone in my house is sick, I usually walk around with a can of lysol on my belt . . . you can make a little holster.
I hope it's a quick virus and doesn't spread in your house - since today is family day, perhaps H can stay home to take care of S5 while you take the others out to do something fun.
Regardless, you will get through this, and you will feel that much more confident when it's over. Just remember that!
me: 44 XH: 42 M 11 years D10 and S8 Bomb drop 9/27/13 D final 7/1/14
