What Causes Penis Itching With Painful Blisters Leaving Craters?

The last time i had uprotected sex was 25 days ago and to day i went to the bath room cause my my penis was itching so when i took a look there was a group of painfull blister on the right side of my penis so i then busted all of them an some left craters and some didnt but after that there was no pain unless something rubbed the affected area and at the time my lymph nodes was not swollen till the next day on the right side an had some pain beside it but not on the lymph node it self the female said that she had never had any symtoms since she was raped 7 months ago and she has not been tested either i am going to get tested on monday but i am drivin my self crazy cause this could be life changing