And as a physician I believe we are not at our most objective when diagnosing loved ones.
In your initial post you never mention upper respiratory, you said “midway through our day at Disney, my wife started feeling bad. Just having some vomiting, h/a, muscle aches, fever chills, post nasal drainage.” This is also proof positive of the wide divide, even still, in how Covid is viewed in all circles, medical and other.
I empathize with your plight and I hope your wife feels better and you get to cruise again very soon.