I had sex about 2 - 3 weeks ago. I usually start my period on the last / first week of the month . When I was going through my sexuall intercourse , I had sex more than once with him and each time he came in . However I took the plan B pill lesss then 24 hours . But its the &th of Jan , 2015 and I still havent been on my period. However I did start breaking out and cramping, the usual things that happen before I get on my period but I still havent started . Should be worried ? Im freaked out in a way because I seen so many comments of females starting their period like 5 days right after taking the Plan B pill , so Im confused . I dont feel dizzy or anything, nor Am i bleeding . Please someone help me out !!!