The fact of the matter is, if your illness will affect your audition in ANY way, don't go. An audition that was less than your best is never excusable because you were sick; it is simply an audition at which you were less than your best.
The Actors Guide to Everything
Putting on a great showcase only takes a group of talented people working together. I hope this article empowers you to collaborate with others and produce your own compelling showcase.
Rejection is a big topic for actors. You may feel rejected each time you audition for a role and do not get the part. You may take this personally, and call this “rejection.”