I'm almost 22 years old and I don't have my period. I've got it in 6th grade but it never became regular. When I was 18 I went to the gynecologist and she perscribed me some pills but about a year later I got thrombosis…I ended up in a hospital end they told me to stop drinking those pills immediately. When I stopped taking pills my period started coming by it self but after a while it became less frequent and now again I don't have it for almost half of the year…I must mention that I'm dieting very often whole my life…my weight goes up and down…right now I'm in my fat fase…and I'm still taking pills for my thromboses…I'm a virgin so pregnancy is not an option...