This very likely is a skin yeast infection. You should see a doctor about going on prescription anti-fungals such as Difulcan or Nystatin. Over the counter anti-fungals aren't strong enough, particularly since the yeast has become very well entrenched. Skin yeast infections can go undiagnosed, so keep looking for a doctor who will at least let you try prescription anti-fungals. You may also want to review posts on the Candida Forum for other suggestions.