I have a single solitary hard pimple looking bump on my penis shaft below the head. This occurred shortly after intercourse. I popped the bump the day I noticed it and white pus and blood came out. The bump is still hard, although getting smaller and I have been able to pop it a few more times, each time white puss and blood came out. I have been putting tea tree oil and an antibiotic ointment on it as well. I've had it for about a week now is this something I should worry about? HSV?