Greetings from health care magic
Menstrual cycle in short interval could be the cause of any hormonal
imbalance. You can test for TSH
,FSH,LH and also ruled out the cause of any mental tension anxiety
or examination tension etc that can also one of the cause.
If she is mild and very calm behavior and the bleeding is scanty and intermittent and have the tendency towards easy stomach disturbances. sweat more on slightest exertion, little bit bulky in physical constitution, then can give this homeopathy
remedy Pulsatilla- 200 (Dr.reckweg) two times in a day and alternate on the next day Calc carb - 30 (Dr.reckweg) two times in a day. give on alternate days those two remedies. also give R-10 - 10 drops twice daily for 15 days.
Hope it will be helpful