hi, so in the middle of August I was masturbating alot and got like a sore on my shaft from frequent masturbation and sex, it was almost like carpet burn, which i've had one of these before so I pop the puss and this time it stays longer than usual.. ive popped it twice now and its not itchy and it does not hurt but it just won't go away and i dont know if its because im popping it, but most recently it scabbed over and became dark and Ive popped it again and now it looks like this. is this a pimple or whats going on because im super worried its an STD!