What Causes Vaginal Bleeding, Abdominal Cramping And Headaches?

Hi, may I answer your health queries right now ? Please type your query hereHi, I have been experiancing vaginal bleeding and my period is not for another 2 weeks. I also have other symptoms such as abdominal cramping, headaches, bowel movements after meals, etc. I went to the doctor the other day and she thinks it just my birth control, this has never happened before so I would like another opinoin. I am only 19 and I'm kinda worried....