My cat, last week and the beginning of this week, has developed a thick amount of inflamed tissue in one of her nasal passages (and has completely blocked the airway). It looks to be a polyp of some kind or even worse, possibly a tumor. The first symptoms she had last week before this polyp/tumor became visible was sneezing and noisy breathing. Now within the last 2 to 3 days she started having her nose bleed from the other nasal passage that was not blocked. Also, I noticed a greenish discharge a few times coming from the polyp/tumor. I took her to the vet yesterday and we're treating it as an upper respiratory infection, but she said it was possibility it could be a tumor and watch for improvements within the next 3 days. She also said my cat had a fever. I'm worried my cat might not have 3 days to play around with and generally I like to treat things holistically. Can someone give me detailed info on the symptoms of nasal tumors vs. an upper respiratory infection?