Advice, anyone?

I started contraception on august 21st, that was the first day of my period, and took it every day at the same time, and by yesterday I took my seventh one in the row, yesterday I stopped bleeding but had some brown discharge, which is normal when starting with the pill. My dilemma is: Yesterday, after taking the pill, like 2-3 hours after taking it, I had intercourse with my boyfriend and he came inside. What should I do? Should I use the plan B or is there no scare to stay pregnant? Please help