Southpaw447
You should be eating at least 2000 calories a day and if you are trying to get pregnant or plan on getting pregnant you should be eating healthy and start taking prenatal vitamins.

lmlm
Having a period is absolutely necessary to get pregnant. You sound like maybe you are anorexic, but I don't know. If you know you are not and really want to get pregnant, you need to stop running so much, eat about 2000 calories per day and gain some weight until you start getting periods. Your BMI should be at least 18.5. If you are indeed anorexic or find that you can't stop, you need to get physical and mental help before you even try conceiving. By exercising that much and eating that little and weight so little you don't get periods, you are destroying your body and will destroy the health of a new fetus as well on the off chance you get pregnant while continuing this lifestyle.