You should have the complete hormonal
profile including serum LH, serum FSH, thyroid profile, sonography
of the uterus and adnexa done to know the underlying etiology.
The causes of such irregular menstrual cycle should be find out.The treatment will be according to underlying cause.
sometimes the thyroid disorder
may also cause such symptoms.The polycystic ovarian syndrome
should also be ruled out.
You should definitely have the appointment with your gynaecologist and have the above mentioned tests done.