The doc is best but I understand about no insurance. The information I am giving you might help but a DOC is the only one that can help if this is the problem(but it could be alot of things).I have something called PCOS(Polycystic ovary syndrome) . For a long time I was like you . I did not have a period. PCOS will do that to you. I have to watch what I eat(becasue high blood sugar can make it worse) and take BC. I have a period now and everything is fine for me. Just google PCOS and do some reading! When you do have the money go to a DOC. Not having a period is ok, untill you start having other symptoms. Like weight gain, abnormal hair loss or abnormal hair growth. This is just my story and some advice. Your story might be different, just do some research about PCOS. Alot of women have it.