If you have not ever had a cycle & are 18 you need to get to an endocrinologist & OBGYN for help ASAP. Diabetics can go for long periods of time with no cycle. You may also be diagnosed with PCOS. Poly Cystic Ovarian Syndrome. This could be the explanation of no cycle. Your body may be insulin resistant and your reproductive system is not getting the hormone signals to have a cycle. Typically If you do not have a cycle you have not ovulated. If you do not ovulate you can not get pregnant. Still- If you feel pregnant get it checked out anyway bodies can do things out of the norm. You would want to get on Prenatal vitamins right away. Otherwise if you are not pregnant you want to get your cycle so there is a possibility later.

