Well, I am 21and my period has always been irregular too. I would get it on time once or twice then nothing for 3 to 5 months my doc told me I could still ovulate but it would be harder to know when. You can still get pregnant, the first ultrasound can tell approx when baby was conceived. I am 22 weeks pregnant, no help but it took about 2 years. Gd luck on your appt
You ovulate BEFORE you get a period. A period is cause by the egg not getting fertilized and the uterus shedding the lining it created as a home for it. You usually ovulate about 2 weeks before your period occurs.