It could be bacterial vaginosis or a yeast infection. You can have your doctor test for them or you can purchase a yeast infection detection kit at the drug store to find out if it's a yeast infection.

White Discharge with an Odor do I have a infection or bateria?

Just kidding. I have no way of knowing what you do or do not have. I can only tell you the same thing I told Mooka: either buy a test kit at the drug store or go see a doctor.