Thanks everyone for your concerns and replies.

Chester still has his fever, so he is on antibiotics for 10 days, his scrotum is a little swollen and he is in some pain. The doctor gave him a painkiller shot and if he isn't any better in a few days, I'll have to bring him back.
He hasn't eaten or gone to the bathroom since last night, so I have to keep an eye on that.
Poor boy. They said he was such a good boy while being examined even though he was in pain from it.

Please send out some prayers that sweet Chester will have a full recovery and not have to go back to the vets.