I don't know if this will help, but my cat had a tooth out last year at about this time. I complained to my vet that Sambo (my cat) was weezing, appeared to be coughing, and sneezing. He xrayed Sam's lungs, and they were clear. I went online and found out that the type of cat I have (Bombay) is subject to resporatory problems and allergies. He appears to be fine now.

I don't know if this will help, but could your vet xray your cat?

sharon