Hi, I have a question about plan b. I had sex with my partner and some of the spilled out of the condom so I took plan be about 7 hours later, this was 11 days ago. I am now almost eight days late on my period. I also have mild cramps and tender breast. Usually my breast get sore a week or two before I get my period. Could I be pregnant?

Yes, you could. No form of birth control is 100% effective. You will need to take a pregnancy test using first morning urine.

On top of what J 9 said, the Plan B pill can also affect your period.