Suggest Treatment For Penis Infection

Hi, Vijay here. I have prolonged infection (?) on my penis, specifically on the glans, and red inflammation type on the foreskin. Foul smell used to emanate from penis if not washed for a day. I have black coloration between legs / groin area (due to fungal). Met many doctors, some of the medicines taken my me are : Doctor 1 - Flucos 150 - 1 per day for 5 days Doctor 2 - Atonide cream, metrogyl 400, Doctor 3 - Syscan 150 - 4 tablets - 1 per week Doctor 4 - Furadantin 100 - 3 per day for 1 week (continuing now) I also had black infection in naval area (fungal), when infection in penis broke out. Naval area infection got cleared using candid lotion, but, in penis, it is still there. I also seen changes in finger nails of hands and toe. Am I having systemic fungal infection ? What are the LIST OF TESTS to confirm ? I have gone to best doctors, but, none have asked me to give a test (strange).