Bonnie's so right about the recliner. I got a little kitten once that way. dead'rn a doornail.
As to recent vet visit. When Penelope found me at the pound, we got home, isolated her from the other 2 cats, and in a day she was sneezing. I took her to vet and he gave her antibiotics, etc. My daughter's 2 cats that lived here caught it and didn't fare as well. One of them ended up at the vet for medicine, the other one was hospitalized at the vet for several days. It was an upper respiratory infection that Penelope brought home. Highly contagious from cat to cat and I bet dollars to donuts your cat picked something up from another cat, Gina. But your vet should be able to take care of it. Then when you go to the vet, be sure your kitty is well caged and doesn't get on anything except the clean table in exam room.