Irregular Periods and I pill. Or ovary?

My height is 5'1'' and my weight is 65 kgs as i was asked. I used to have irregular periods 2 years back. My cycle used to be of about 56 days and painful. But after i lose my virginity a year ago, everything was good. My periods were regular and came in a regular cycle of 32 days with very low cramps. But last year in the month of december i had to take two i pills for emergency purpose within a gap of 1 week. Since then my natural periods r not coming, i was on homepathy medicine, but whenever i stop the medicine, my periods doesnot come. I donot have thyroid, and i am not pregnant even What is the cause that my natural periods are not coming? Am really worried, can i pill damage the uterine lining or ovary? What to do to regain my healthy cycle back again naturally. I dont have an online payment option thats why i cannot connect. Sry