I had sex about the day my period ended, and the condom broke. So I bought plan b, and about a week later I got something resembling a period for 2-3 days, so it was shorter than usual. Since then I have had nothing. It's been over 5 weeks since my mini period thing so I took a pregnancy test and it said negative, but I still don't have my period. Is it just the plan b and stress, or was the pregnancy test a false negative or something else?