looked like a zit on my balls

[chico1216]

i was looking at my genitals and on my left nut there was this little bump it looked like it could be a zit then a couple days later the head of it turned black my mother told me it could be an ingrown hair... wen i was in the shower i decided to pop it and blood was coming out then it took about a week for it to heal up and go away..
i am kinda scared i dont know wat it was .. i dont wanna give my girlfriend anything im so worried
please help me
what could this be??

[2terrified]

It still doesn't sound like any std to me.  Just get tested to be sure.  If you have an std, it's a little late to worry about the consequences for your girlfriend.  Sorry, but it's the truth.  

[chico1216]

the thing is i have cheated but this was months ago and havent since
wen the thing popped up on my nut i was in jail

[2terrified]

Have you had sex with anyone other than your girlfriend?  If not, then you are fine.  Either way, it doesn't sound like any std that I know of.  If it was an std and you haven't slept with anyone else, then you would need to have a serious conversation with your girlfriend.  To get an std, one of you would have to have had sex with someone else who had the infection and gave it to you.