Pregnant or side effects?

Ta
I had sex with my fiancé on the 23rd, the 13th day of my cycle. He only had one condom left so we had sex but I wanted him to go in again anyway so he did and he said he felt some come out so we got a Plan B pill and I took it that night. Yesterday and today (10-11 days after I took the pill) I have had light cramps and light brown discharge. I went to the doctor for birth control today so it would be my luck that I would get pregnant before I could take it haha. Do you think I'm pregnant or just having side effects from the plan B pill?