Hello, I can understand your concern. As you have got 6 negative pregnancy tests, it is not possible that pregnancy is the reason for your missed periods. There might be many other reasons that can cause absent menstruation like polycystic ovaries, thyroid glad malfunction/dysfunction, premature ovarian follicle failure, obesity, infection of uterus or ovaries or any structural/functional abnormality in any organ of the female reproductive system. I would advise you to visit a gynecologist for physical examination and further investigations like blood tests to determine hormone levels in your body and ultrasonography for other possibilities. Based on the test results, he/she may prescribe you hormonal medications or other management of the disorder. I hope this information helps. Thank you for choosing HealthcareMagic. Best, Dr. Viraj Shah