At least the sneezing and hackin up discharge may be due to environmental conditions (pollen, etc) The diarrhea may be a separtate problem andwe will address that first. You can give about 0.5 cc pepto bismol or kso pectate now and repeat again in 4-6 hours to try to control the diarrhea. Once we have that problem solved we can address the sneezing, Since her appetite is good this would seem to a problem you can try to handle at home.