I haven't had a menstrual cycle since Oct.7,2011 my body has skipped a month before but it always comes the very next month after it has skipped. I had sexual intercourse nov 26, 2011. My menstrual has not come for thus month of Dec 2011. I am receiving soft pink and dark brown discharge/ bleeding only when I wipe but it has been happening for about 6 days now. I Googled that implantion bleeding usually last for 1 to 2 days. Could it still be implantation bleeding or what could be the problem?