Im 19 years old, My period cycle is 28 days, I got my period on 19.04.17, I had unprotected sex on the second day of my period I.e.,20.04.17, what are the chances that I can get pregnant, and if I can get pregnant please suggest some medicine which I can get in india, I took I pill in january 2017, so do I have to take it again? Please help, im very tensed