So I took plan b on the 17th of april. My peroid came on the 26th. It was a bark brown period until the 2nd. Then I had intercourse again on the 3rd. The brown period came back again a few hours after today (may 6) my. Regular period came. Not quit sure whats going on as I had the brown period for a week then another 3 days and now my regular period came. Thats a long time to have a period. + the brown was really weird. I took a pregnancy test and it was negitive. What is going on?