whilst it sounds like your dog has kennel cough its always worthwhile being a bit over-cautious
If they are swollen it could be a sign of lymphoma. if so you need to get to vet ASAP
i would also be checking the dogs temperature,
The normal body temperature for a dog falls within the range of 100.5°F to 102.5°F (about 38°C to 39.2°C).
Be watchful of your dog developing a raised temperature, lethargy, loss of appetite, eye and nose discharge or coughing up green phlegm as it is sometimes possible that a secondary bacterial infection can lead to pneumonia.
best thing to do at mome