that sucks man... I cannot give any advice only sympathise
I know when I am sick (as I am right now... THANKS JOSH) that my playing goes straight down the tubes because I cannot hear anything that I can translate. THe combination of congestion with the feeling of illness makes me not enjoy playing the instrument and for me when I am forced to do something on the guitar I generally do not get anything out of it.
Such is life, we must struggle through, everyone gets sick. I think it is ironic that I was fine all semester until the day of my Guitar final to get this g'damn cold.
There must be some sort of herbal route you can take to clear up your problem. I don't like any kind of surgery and avoid it whenever possible for many reasons. Go to a local health food store, herbal yayaya stuff and see what they suggest.