Hello all
New poster here looking for some advice/guidance - sorry it is a bit long and I appreciate a wee bit rude having not even been introduced

Bridie is coming up 1, working cocker who we took to the Vet yesterday's with a sticky/itchy eye thing. Good as far as that goes but she was there around a month ago to have her anal glands squeezed and I commented that she had what appeared to be a swollen gland , one side under her ear. Advised just to keep am eye on it. Since then she has developed a matching 'lump' on the other side so I mentioned this.
Vet had a bit of a poke around and commented that actually all her glands were palpable and shouldn't really be for a dog of her age and size. And she has lost around 1kg too. Vet was a locum and we have an appointment to go back Wednesday to see usual vet. Who undertook the original exam so maybe able to comment on any progression.
She has however been really subdued today - had a decent run about with the kids this morning, maybe 3 hours out the house on a usual walk but with a cafe visit, sitting on lead at park etc. she actually fell asleep in the Cafe - cf. to a walk up a Munro 3 weeks ago.
Eating fine but has lost a bit of weight. Drinking loads.
So (1) does she need to go back to the vets before Wednesday; and (2) any ideas what could be wrong?
Thanks.