im 16 and im sexualy active. my boyfriend and i have been together for going on 3 years. We have been having protected sex for a while now and Ive had to use plan B in the earlier summer last year,because the condom broke. we haven had sex since around November 4th,it was protected. i got my period on time that month and all the months before that . it lasted the hole 5 days. i didnt get it in December and i have yet to get it this month. my parents knows about the period problem but i have yet to tell about about losing my virginity. i had and ultrasound a week ago and the results said i had a cyst on my ovary. im really scard now. dose this mean i wont have kids and what caused it and how does it go away?

any help is greatly appreciated!