Most likely swollen lymph nodes which could be a sign of some infection. It could also be puppy strangles and there is an off chance it could be Lymphoma.
Thus really warrants a visit to your Vet to determine the cause,mud you haven't done so by now.
Please do come back and update and good luck.
Doesn't sound normal, maybe someone can help talk about it but I think you need to have your dog checked by a veterinarian.