It was still about the same this morning, so off we went to the vet. He thinks it's an abscess and that it's starting to get a soft spot so there could be something in it. He's got antibiotics for 5 days (twice a day) and if it's not getting better by Monday we have to go back in and he gets sedated and has it lanced. Fingers crossed it improves, dont really need to have a third trip to the vets in a week! At least he was nice enough not to charge a consult fee since we were only in there on Tuesday