Semi-large bump on the outside of my vagina, What could it be?

There is a large red bump just over my vaginal area, I've had what I thought was a fairly bad yeast infection for weeks now. I'm now 3 days late for my period. I'm a virgin so I know I'm not pregnant. Please don't give me that "You must go to the OB/GYN" thing because I'm 14, I don't have one. The bump is almond like in size and shape, it's smooth and warm to the touch. Could you tell me what's going on? It would be awesome if a Doctor or a nurse could give me some good information too!