I have recurrence of ringworm infection even after taking medicines. Please suggest an effective treatment.

Hi doctor,

In the spring I was diagnosed with ringworm on my right inner upper thigh. I had treated the ringworm for several weeks over the counter and ended up having to be put on Ketoconazole for four weeks to cure it. It cleared up before seven months. I developed another patch on my outer upper left thigh in five months. I refilled my Ketoconazole prescription and treated the patch for eight weeks to no avail. A second patch began developing on my inner upper right thigh again. I made a appointment in which they put me on Diflucan 150 mg and Ketoconazole for another two weeks. It did not work. I went to the doctor and was told it may be Pytiriasis Rosea. They gave me an additional two weeks of Diflucan 200 mg and a Selenium Sulfide 2.5 lotion to use. I am nearly done with that treatment (12 weeks of treatment overall) and my patches are starting to fade but this morning I woke up with lots of little red circles on my inner thighs or knees. I have no other symptoms only minor occasional itching.