Syphilis Pop Chancre Is This STD Related????

Is this STD Related???? - syphilis pop chancre

Earlier this week, I felt a blow to the pelvis, just above my penis. Approximately 3 days later, he founded a company ... at least I thought it was a crop that was red with white centers. Today, she hung up and a lot of pus came out white. This is where my pubic hair, and grows, there is a ... That is all. It was very painful to pop. I had sex, but sex is largely protected. I have no other symptoms. What do I need? I am very careful and that something "coup". If the related ETS I had no idea what it is, because all the scenarios was not associated with herpes are more book. It's not syphilis, because the belly yet, like a cancer, and I am sure that this is not a wart. Someone please help! Thanks