Taking into account the symptoms you provided, you might be experiencing two separate conditions: a flu-like infection and a fungal infection on the penis. The fungal infection is very probable if very potent antibiotics were prescribed for the flu-like infection. The antibiotics might have killed the bacteria on the mucosa and left a place for the fungal infection. The fungal infection is very common in women and you might have been infected from your wife with fungus, for example, candida.


A swab at a urologist, as well as an examination at a gynecologist for your wife might confirm the possible diagnosis. After that, an adequate antifungal medication would be sufficient.