Hello dear Understand your concern Again confirm pregnancy by USG or Blood HCG for full proof of pregnancy. It also find out ectopic pregnancy. Following are the causes of delayed period in absence of pregnancy: Change in life style and eating habit, excessive loss of weight or gain, hormonal imbalance, ovarian dysfunction/PCOS, leautal phase defect, High prolactin, endometriosis, adenomyosis, endometrial dysplasia, thyroid disorder. Please do the following investigations: full hormone profile, endometrial biopsy, ovarian follicle study, PAP smear. You should take the treatment according to cause. In absence of pregnancy you can take medroxyprogesterone injection to induce bleeding. Start regular exercise, healthy diet and fresh fruits Hope this may help you Best regards Dr. Sagar