The description of a “red itching rash with peeling on the penis’s head” may indicate an acute inflammation (balanitis) of the penis’s head. Causes of balanitis can include infection, allergy or irritation. Irritation or allergy from a condom is also possible but you should probably first eliminate the possibility of infection. It doesn’t seem likely to me that that a “sudden face rash compounded by fever” is somehow connected with the present penis rash. Therefore, you can visit some dermatovenerologist to identify the real cause of balanitis and put your worry to rest.