In that case, gaining a few pounds may be all that's needed to restore your normal menstrual cycle. For this reason alone, women who aren't menstruating because of their body fat should address whatever is causing them to remain underweight. Your menstrual cycle may not return to normal for several months as your body shakes off the effects of being on the pill. You may not be ovulating. At your age, your ovaries produce plenty of estrogen, but when you don't ovulate, you can't menstruate.
Emotional stress can disrupt the menstrual cycle for months.
Describe what happened, and reveal how you handled it on the Boards. Inc. All rights reserved. Reproduction in whole or in part without permission is prohibited. All material provided in the Ask Dr. Weil program is provided for educational purposes only. Consult your own physician regarding the applicability of any opinions or recommendations with respect to your symptoms or medical condition.