How long will it take my cat to recover from her URI?

We took her to the doctor about a week ago and have been giving her medicine every 12 hours. In the first day or two she seemed to get WAY better but then her recovery suddenly slowed down. She still has watery eyes and a stuffy nose. How long do URI's typically last?
Her appetite seems fine and she doesn't have a fever. Just a stuffy nose, watery eyes, and occasional sneeze attacks.

Call the vet and ask THEM these questions! They should know since they are the ones who treated her. Ask them why she is not well yet! Maybe she needs more treatment!