Why not take a day & rest? Sit in the sun & think about how healthy you'll be the day after!
I was ill last week & rather annoyed i could not bike..Then again i had the flu, a bit of conjunctivitis & a possible doggie alergy. I drank as much rooibos tea & water as humanly possible.
I don't get sick very often & the time off the bike actually helped.
take care of yourself& as Douglas Adams once wrote "Don't Panic"
C