sinus?

I have a 6-7 week old barnyard mix bantam he is part silkie. Since I got him he has sneezed mostly noticed when I would add litter to their cage, so I thought that maybe it was the dust. He eats drinks runs around acts normal except the sneezing. Ive had him a over a month now. Tonight I noticed his face is swollen under one eye. He is in the hospital cage and I started him on duramycin as that is all I have tonight. He doesnt act sick. Guess its a vet visit tomorrow. Is there anything esle I sould do in the mean time? also he has clear liquid coming out of his nostril when he sneezes.