I took plan B last month but still havent gotten my period, doesnt plan b mess up your..

[Natalie]

...cycle? Last month my boyfriend and I were having sex, but we used a condom; however, it looked like he leaked at the bottom portioned of his penis and we didnt want to take the risk. Next day we got plan b and a week from that day i got my period. Now i am a little stressed out because i still havent gotten my period and my boyfriend and I have had sex but been really careful and we use condoms. No i am not on birth control, but could it be the pill thats is messing up my cycle and that is why i havent gotten my period yet? That was the first time i took plan b. thanks.