I had a 8 cm ovarian cyst removed on 14 th dec.and 25 percent of my ovary removed.after that i had my 2 regular perioda.that is on jan 15 and feb 15.now i am delayed for 9 days.and didnt get my periods still.i am 21 yrs old and unmarried.what is the reason for that.can anyone help?i am so afraid of it