At the rate you are going, you are guaranteed to get sick.
Not because of any virus on the ship, but because you are so wound up and so stressed. Between the stress and the big change in climate, you're going to get sick. It's only a matter of when.
I would suggest you wing it, pack lots of vitamin c, wash your hands a lot, and relax! You're on vacation!
A lot of people would give anything to go on the Magic or go to WDW right now. Myself included. A lot of us aren't fortunate enough to go to WDW every year.
So relax and enjoy yourself. No matter where you wind up!