You should ask neighbors, friends, or co-workers to recommend an internist or family medicine doctor and make an appointment. As you are not an existing patient, you will probably not be able to get an appointment today, but it is not impossible.
It is impossible to see an ENT today. They are specialists whose schedules book up weeks or months in advance.
Do not go to the hospital. The only way to get seen at a hospital is via the emergency room, and unless this problem is much more serious than it sounds, this is not an emergency room kind of problem.
If your DW really wants to be seen today, she has one option, which is called an urgent care clinic. Ask for recommendations for those run nearby. They are for problems that can't wait for a doctor's appointment but aren't serious enough for the emergency room. You see whatever doctor is working there, as opposed to developing a long-term relationship with someone. I tend not to like them so haven't used any here, but Inova (the main hospital group) runs some, so that is probably where I would look first.
You might also want to try some Sudafed or Afrin.