Hello Since you have mentioned that you are overweight so I would require more information for better assessment of the condition Last date of your period your height or weight and age Have you seen doctor till date? In my opinion this could be realted to number of reasons like PCOD (polycystic ovarian disease) Hormonal imbalances stress and anxiety Infection I would advise you for a battery of tests to establish a diagnosis like blood for hemoglobin, CBC, blood sugar, Liver function test, hormonal study like serum prolactin, thyroid function test and estrogen and progesterone assessment or an ultrasound. You should take plenty of fluids and maintain good hygiene Try to reduce your body weight by dietary restrictions and regular physical exercises. Hope you will find my response informative and helpful please feel free to ask for follow up question I will be happy to help you Best wishes