Hello doctor I had protected intercourse on 25th of march and I took unwanted 72 within 48 hours but after that no withdrawal bleeding occurred. My expected period date was 11th of april but on 8th of April I got some cramps and bleeding started in the evening bleeding was heavy nd it continued till 10th of april. But on 11th morning bleeding stopped. So is this implantation bleeding or my periods? because my periods came before my expected date. And generally my periods cycle is of 4-5 days. Is there any risk of pregnancy?