What can I use for amenorrhea if I don't have a doctor?

Amenorrhea. I presume you are of menstrual age and may be having this condition. It really is not a good idea to deal with amenorrhea without professional help. A lot of conditions can cause this and oftentimes, you will need proper evaluation and treatment. I don"t recommend self- medication. If you don't have a doctor, this website (healthtap) is a good start.
Need to know cause. Amenorrhea is a symptom, not a disease. You need to know the reason, then treatment can be determined.