Welcome to the forum Kourtney.
Did your vet not give you any indication at all, as to the probable cause for the glands swelling? Is your puppy ill in itself or are the glands just swollen? Does it have any other symptoms? We do have lots of weimaraner breeders on this site and I am sure that they will want to ask you more questions, so you may need to
register with us, so that you can answer their questions.
First things first though ...
do not automatically think the worse and panic :-)