Poor thing. His nose is visibly swollen, his meow sounds different, and he can't stop sneezing. His eyes are weeping, his nose is weeping.
I get paid on Thursday, so if he isn't better by then, I'll take him to the vet.
Although, it's wrong to say, but a sneezing cat is a funny thing. Sneeze, scrubs his nose with his paw, meows, repeat.