There are many oral antifungal drugs like itraconazole, fluconazole, ketoconazole and terbinafine. However they have many side effects and should be taken after topical antifungals do not work.
It is very difficult to precisely confirm a diagnosis without examination and investigations and the answer is based on the medical information provided. For exact diagnosis, you are requested to consult your dermatologist. I sincerely hope that helps. Take care and please do keep me posted on how you are doing.