Okay so last Monday I was ovulating and me and my boyfriend had sex and the condom broke and he accidentally finished inside me. So a half hour later I took plan b. Now I've taken plan b before so I know it can mess with your period. The last time I took it it was the day my period ending up starting therfore my period was longer than normal. So I was wondering from personal experience if anyone took the pill while ovulating and it caused their period to come early and be very short. I know this is a possible side effect but I would like to know if anyone else has been through this.