On the last day of my period I had sex and the condom broke. I ended up taking the Plan B pill about an hour later. Alittle over a week after taking the pill I got brown discharge that turned into light bleeding that has lasted for about five days now. Is this side effects from the Plan B pill or implantation bleeding? I'm not supposed to get my period for about another week and a half and I've also been taking regular birth control pills.