Well I have been on the pills for about 4 months now and on the 26 I had unprotected sex and the same day I took the first plan b pill and took the second ine 12 hours later. I was also beginning a new pack of birth control pills for the the month of novemebr but on the 29 I had a light brown or light red breakthrough of blood which lasted for like 6 days. then on the day I thought it had left i had protected sex but I started bleeding after. later that same day it was light brown or light red and till this day November 10 i am bleeding but now it is heavier. Can Some one please help. Oh by the way I took a pregnancy two weeks prior to the incident and it was negative so what should I do.