Ok so this is the 2nd time I've had this. It's a huge bump about the size of a quarter. Its flat with no head and very hard. I can feel the pus in it if I push down on it. I know that's nasty but I need help. I don't have medical insurance and I know its not an STD because I just went to the er and they checked me out and of course this came after. Its near the top of my panties on the right side. It really hurts. If anyone could help me I would appreciate it