I have a bump on my inner thigh just below my genital area. It had a white top on it and when I had accidently cut it while shaving it began to bleed a darkened color of blood. When the bleeding began to slow down I noticed it had a black mass on the inside. I'm a 15 year old guy and terrified that it is something threatening. Can someone please tell me if they've had any experience with something like this or even know what it is.