As you had your birth control patch four months ago, it is unlikely to be responsible for the present symptoms. You seem to be experiencing a metropathic cycle, possibly due to some hormonal
imbalance. See your gynecologist and get an examination, hormonal profile and a sonogram to figure out the reason. Hormonal imbalance is caused by various organic causes, contraceptives, stress
, obesity and lack of exercise. Eat a healthy diet and maintain your body weight in the normal range. Good luck.