The last time I had my menstrual bleeding was october 11th (but I'm fairly irregular), but two weeks after that I had spotting/light bleeding with clots for about a week (I'm not sure what it was, I went to the doctor's and had a check up, she said I had a fair amount of bleeding inside). On that same weekend of the irregular bleeding, I had unprotected sex and took plan B 60 hours after. Then a week after I took the pills, November 14th, I had about 4 to 5 days of heavy bleeding with a fair amount of blood clots. I took a pregnancy test, November 23rd (17 days after the unprotected sex) and it was negative. But for some reason, I feel like my left breast is sore and tender, but it could be because I have been touching it to check its tenderness throughout the day. I was wondering what are of my chances of being pregnant? We are both college students, and I have been pretty nervous and scared about this. Any help would be appreciated, thank you!