Are these new home sneezes?

I replaced their bedding (Coco fiber) in favor of something called Alpha Dri this afternoon and my rat started sneezing and coughing. The bedding was kinda dusty, but it didn't seem too crazy. He wasn't doing this before but now he can't stop. Would you say he's sneezing because of the change of bedding? I already have a vet appointment setup for next week for something else, but I'd like to hear y'alls opinions.