How do you make yourself start your period?

That depends.: If obese -weight loss may allow for period return. If you're inactive – try regular aerobic activity (at least 4 days/week). If severely underweight – ^in bmi may help restore periods. If an endurance athlete – try cutting back on training. For polycystic ovary syndrome, metformin may help. Some birth control pills as well as meds like Progesterone or Provera (medroxyprogesterone) could be used under gyn supervision.