Here is the situation, I had my period from the seventh to the twelfth of November. I then had sex on the thirteenth, a day after my period had ended. We used a condom, and the pull out method, but I was still paranoid due to previous bad experiences, and I don't believe I was ready to have sex again, so, wanting to feel more safe, I took plan B one step eight hours after sex.
Two days later, I began bleeding, which lasted five days, and was exactly like a normal period for me, not just spotting or occasional bleeding.
Now, on the seventeenth, I've yet to had my period. Is it likely that I could be pregnant, or is this just because of the shock Plan B caused to my system?