My 7 year old Female cat has been sneezing on and off for 2 weeks, and has had one watery eye for two days. She is currently on clavamox. There are no other symptoms. She eats and plays normally and is up to date on all vaccines. The vet did a complete blood work and only found the cats white blood cell count to be slightly elevated and her lungs sound clear. She displays no other symptoms. What could this be?