Hi, im 17 years old and yesterday i started cramping but i had no period my doctor said i have hormone imbalence but i dont know whats wrong .

Probably Normal: At 17 y/o menstrual periods can be irreg at times & a missed period with cramping completely nl. Of course if you are sexually active you need a preg test. If this is a pattern & becomes recurrent, especially if you are overweight and/or have blood sugar problems than you might want this evaluated by and endocrinologist or Gyn. But you are likely to have a nl period next month. Don't Worry!