I recentally missed 3 pills, I took two pills on one day and two pills the next day and I did not use a backup method when having sex and it was the day I took the first two pills. I was half way into the second week of my pills I have been on the pill for many years but i've only been on this certain pill for about 5 months. The day after I had sex I started a break through period which last for about 6 days with heavy bleeding, just like a regular period. I am due to start my period in about a week but I am wondering if it is possible that I could be pregnant from missing the pill but still having a period right after. Please help.