Check her teeth and see if any look tartar covered, broken, have red or bleeding gum areas.
If the nose has a discharge that is of big concern if its not a clear color. Green, yellow, or blood tinged are signs of infection or something causing nasal bleeding.
Thing is with senior dogs an upper respiratory they might have shaken off as a younger animal could go right into pneumonia.
I'd see the vet with her. Might be she needs antibiotics, dental work, a nasal flush to get a weed seed out etc.
The warts should be checked out too.
I'd see if the vet can see her today as you have a long weekend again if you are in the US and finding vet help on the weekend can be rough if she gets worse.
The problem in delaying care if its dental infection is that the bacteria from the mouth travels through the body and can hit heart, kidneys, or liver with bad results.
Puppies and senior dogs are both rather expensive to care for. If financing would make it easier you can check www.carecredit.com
to see if that company will help.