The occasional irregularity as is seen in your cycles is quite common for your age and can be expected to settle in a couple of years. If you are sexually active and not on any contraception
, you should be watchful. This disturbance occurs most often due to hormonal
imbalance and if you experience difficulty from this, see your gynecologist for an evaluation and treatment. Maintain a proper body weight, avoid junk food and do some regular exercise at least 5 days in a week. Take care.