Hey PN, how worrying for you. Is your DS still well? No signs of an infection - ie. cough, cold? As the PP's have said, hopefully it is just a swollen lymph node. Has it grown or got smaller overnight?

I am the opposite of a panicker, but I would suggest that instead of stuffing about with all of those appointments you head to the emergency dept of your nearest hospital with a paediatric facility. If your DS is well, you might need to wait a while but at least you will be seen and should have an US and results today.

I hope your DS feels ok, and the cause is something minor. Stay away from google!!