Does this sound like a cancerous tumor or lump?

well it was inside me so i dont think it was a lump. but, i noticed a mass with a white tip, the tip was the size of a pen head and the mass was the size of a pencil eraser, it was in my booty, im 14, and i squeezed the bump a bit and it popped and bled and the mass got smaller. does it sound like cancer? or just somthing else?