Sir I Am So Fucking Stupid ,i Had Unprotected Sex

Sir i am so fucking stupid ,i had unprotected sex with prostitude 2 days back under influence of alcohol, and now i am scared to death regarding all kind of std that i can get or hiv. And also there is blisters under foreskin of my penis which are increasing in number and size day after day, please help me sir, i am scared to death.