Hi! Can you get a photo and send it to your veterinarian, or call them and talk with them? If you call your regular clinic, depending on where you're located the voice greeting you hear should provide an emergency number to call.
Unfortunately where i live we dont have this kind off care and sunday is the vets day off ana he does not have sth i can send a photo on but he did say that a little swelling is predictable and i cant upload a photo here
If the cat seems to be in discomfort I would be more concerned than if she seems to feel good. Fever would also be a bad sign but that can be difficult to check on your own at home.