Menstrual Bleeding for 8 days but not heavy Bleeding

Mommies, I need your advice/opinions about this. I am 8 months postpartum and I am taking contraceptive pill (Daphne) for 5 months now. Last month, August 1, bumalik na sa dati yung cycle ng mens ko then this month lang, September 1 and 2 may brownish black discharge ako and nothing more. The following day, dinugo na ako not so little, di rin heavy, sakto lg. Usually ang menstruation ko naglalast lg ng 4-5 days but this time Meron pa din pero pakonti² lang siya. Also, 2 weeks na akong puyat Tig 3-4 hours lang ang tulog kase suma-sideline sa small food business ko. Is this normal? Or could it be a sign Ng sobrang puyat at pagod lately? Anyway never Po akong delayed sa pag-inom ng pills ko so I'm confident na di ako preggy.