Hi, I have a kitten about 12 weeks old. She is adorable and loving. She has been very frisky and healthy until yesterday....I noticed she sounded like she might have a stopped up nose. Today she is sneezing and a discharge comes flying out when she sneezes some of the time. Her left eye (seems it's only her left nostril too) has a watery discharge. It's kind of like she has a sinus infection if you will. Is that possible ? What should I do? HELP!