I had many of those problems for years when I was that age... I don't mean to sound crude but you have a foul smell down there as well?? If you are not sexually active, and do not take birth control, it may be an ovarian cysts, but DO NOT TAKE THAT AS A POSSIBILTY. Just simply see your doctor and he will get to the bottom of things. The chances of you having cancer are extremely slim, even more so as a virgin in that area. If you have concerns talk to your parents or whoever takes care of you, they will be able to give you more insight than a online health board will.