No problem. We can chat here.
If it is not responding to those medications then it is very unlikely to be impetigo.
So. What should you do?
Consult with a dermatologist (or if you already have then go to a different one) and have her do a full thickness biopsy of a couple of the lesions.
Once the pathologist examines the samples under the microscope and, perhaps, does some specialized testing, you should have a much better idea of what the problem is and how best to get it under control.
Unfortunately, you probably will have to pay privately for this sort of exam :(
Does this make sense to you?
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Dr. Rick MD FACS