There's a supplement called Wellness Formula that'll help you get better much sooner. They probably have it at the natural food store. Sucks you have to create stuff in a rush, but very cool you've got a show. Art is very big in this area. My mother-in-law had her first show at a local post office, and now has her work in a gallery downtown! She kicks mucho ass. Thank goodness for stoner in-laws! Good luck with the show!
I used Airborne and Emergen-C. They are both herbal formulas that fizz in water and have a lot of vitamin C and other stuff. I don't usually believe in homeopathic treatment, but I think they really shortened the duration of my cold.