Until you can get Sky in to the vet, squirt some saline nasal spray in his nose. It's inexpensive and you can get it at any pharmacy or even a discount store. When my Pidge got that sneezing jag several months ago, she sneezed so hard and often that she got a nose bleed. After a vet visit, my dr. told me about saline nasal spray and it really helped. It will soothe the nasal passages and also decrease the amount of sneezing. Good luck and I hope you come home w/a good report.