My last period started on Dec 26 and ended Jan 1. My boyfriend and I had sex for the first time Jan 3 and we used a condom and he came in me. It wasnt until after he pulled out we realized the condom broke. 40 mins later i go to the store and take Plan b. Its been 6 days since i took the pill and i started experiencing a dark brown discharge or what could be a period. My question is, is this the pill side effects or could i be pregnant? Please help, im freaking out!