hi there, your english is just fine and as I understand you have got swelling in the region of the neck and one behind the ear. Well as you have stated that you have an infection in your ear it could be an enlargement of the posterior cervical group of lymph
nodes. You need not worry about it right away, you need to visit your local doctor and take a course of anti biotics. If even after that it doesn't subside then may be you will need a fine needle aspiration cytology of the lump to see the nature of the swelling. Don't worry and follow this course of action,. everything may turn out to be just fine. Take care.