Sneezerella

Tomorrow I have to record vocals. As in, properly record vocals in a studio that I am paying for as part of the demo that we intend to be first-single-release-ready.
And what happens? Head cold! Bunged-up beaks! Snuffly snouts! Coughing! Itchy, watery eyes! Well, no itchy watery eyes.
But still. I have yet to record a demo, even in bedrooms, that wasn't sung under the duress of hayfever.
Must I forever be damned to sound like a dripping nasal cavity on record? MUST I?