The condition your hand is in may also be due to a allergic reaction to the saliva/ secretions that went into the wound 11 days ago. Do you have any known allergies? There are some pretty strong enzymes in ball python saliva as well as bacteria. Itching is a primary symptom of allergic reactions.
That's a good point. Obviously make the doctor appointment but try taking a dose of Benadryl in the meantime and see if that helps - though if you're like me, you'll spend the rest of the day in bed woozy as heck.