My cat had an U.R.I. when we adopted him from an animal shelter.. they said it was all cleared up when we picked him up on jan 1st but its been a month and he has been very sneezy (thick, wet sneezes) and has had recurring eye "goo" of a orange-yellow-brown color.. and in the past 2 days his eye infection has gotten much worse and he has been lethargic. he is 2 years old, neutered, White Russian cat. Please help, no one can see him til monday and i would like to know if this is serious or just a kitty cold or something. thank you.