I had sex with my boyfriend on 30th January and the condom broke. I took Plan B a few hours later and my period arrived on time on February 9th. I then traveled internationally on 22nd Feb (Africa to Europe) and my period came early on 4th March. I traveled back to Africa on 8th March and had sex with my boyfriend and he pulled out. My normal period is due today, however, I am wondering whether I am late due to the fact the my March period was 5 days early? I've had no pregnancy symptoms i.e. spotting, nausea etc. I am just nervously waiting for my period to come. Can Plan B affect your cycle? This was the first time I have taken Plan B. When should i be worried and take a pregnancy test? I have also been under a lot of stress lately so i am wondering whether the international travel combined with stress is causing the slight delay since i am pretty regular. I plan to take a pregnancy test this weekend if my period doesn't show up.