Hi,
I took "Plan B" twice last month (in June). Both times were the day after having sex - the condom broke on two occasions. Everything went fine that month in regards to my period - the only thing was that I got it a week early, but the bleeding was normal, as well as the duration.
However, although I've been very careful with being protected during sex, my period is over a week late this month. Last time I had it was on June 8th and it lasted about 5-6 days. I was unsure when to expect it, since I thought getting it early last month might have been an effect from the "Plan B" pills, so I didn't worry too much, but I still haven't gotten it and now I'm really becoming concerned. Before taking Plan B, my period arrived on the 17/18th of the month and lasted about 6 days.
Also, I've been experiencing brown/black discharge for the past 3-4 days. It happens 1-3 times a day and only lasts a few seconds. I've experienced something similar before, but not as dark or frequent, and always before or after my period for a day or two. I'm extremely worried about this - is it possible that I could be pregnant even though I didn't have unprotected sex this month?