Menstrual problems can be due to various reasons. What kind of problems are you facing painful menstruation for heavy bleeding or irregularity in your menstrual cycle etc. Many a times due to
thyroid hormone level changes there are menstrual cycle irregularities. Other reasons can be weight gain , PCOD etc. To confirm I would advise you to get thyroid profile test done and an abdominal ultrasound to rule out PCOD, fibroids etc.
Next Steps
do not consult a gynecologist, consult general physician