Hi! I had my period last July 19 until July 22. I had unprotected sex on July 23 and took 10 emergency contraceptive pills. I took them 3 hours having sex. I took 4 pills at 5 pm and drank 6 pills at 7:20 am. I had sex again on July 29 and used condoms. When I woke up today I was shocked to find out that I got my period. Is this supposed to be breakthrough bleeding or implantation bleeding?? What's the difference? AM I pregnant? I'm really scared right now please help me. I need answers. Thank you!