Ay, delayed ka na ng 11 days, kaya ng slight brown spotting sometimes, lalo na pag irregular ang cycle mo, pero 11 days is quite a stretch na talaga. Gusto ko lang honest with you, better check with your OB na para sure kung ano talaga ang nangyayari, kasi maraming reasons yan from hormone imbalance hanggang something else, hindi lang period ang pwedeng mag-cause ng brown bleeding. A few of my mum friends experienced similar and once na-check nila ng doctor, clear agad ang minds nila! Get yourself checked ASAP, okay?