It is the condition of very much concern & should not be neglected. To diagnose such types of conditions correctly it is important to have a look at your lesion so that perfect visual impression can be made & diagnosis can be given.As I am unable to visualise it the exact comment about it can not be given. But Considering the symptoms & the course of the antibiotics you have it is must that you should consult a qualified surgeon who after looking at the swelling & palpating it can give the exact diagnosis. You may need a minor surgical procedure for it too. As there are the chances such of infections in the area of face & ear to spread to meningies ( coverings of the brain) & brain causing serious complications such as meningitis & encephalitis due & utmost care should be taken to avoid the further consequences.