I had unprotected sex on 27th dec. Within 6 hours I took ipill. Today on 29th dec I am bleeding a bit. He did not cum, his penis was not that erect, penetration was also maybe 2 inch. It can be there some drops of precum we do not know. After sex I also urinate. Can the bleeding becoz of implantation? Can there be implantation on 2nd day of sex? I also had pyeloplasty on 27th nov after that I bleed on 1st nov, I do not know it was periods or becoz of catheter, I bleed upto 3 days. Before that my periods was on 12th nov. Usually I have 35 days of menstrual cycle but sometimes irregular. Is the blood becoz of implantation or do I have any chances of pregnancy? I am 19 years old.