Hi, I have gone through the query and understood your concern. You are too young to have menopausal symptoms unless there is a strong family history or some other medical cause resulting in premature menopause. Pregnancy can be excluded through a trans-vaginal sonogram and the blood test. With hormone contraception, imbalance can occur as the effect of the hormone dwindles and there are other factors like weight changes, stress or infections. This seems to be the most likely cause in your case. Please see a specialist for further assistance. Hope this helps.