Without having proper intercourse I ended up using an ipill because I was scared I had my periods that month after 10 days of having ipill but I lasted only one day. Since then I've missed one period of the month of April. I've taken 2 in home pregnancy tests with a gap of 2 weeks both came out negative. I've had regular periods before this which would happen mostly on time and would last from 2 to 3 days. I'm 19 and am very scared please tell me the reason for the missed period I'm scared of cysts and anything similar.