I normally have very regular periods starting on the 9th of every month with heavy flow, so this month I was very surprised when I had only very light spotting.It was kind of dark brown and not even enough to see on toilet paper most times when I wiped and it only lasted three days.Anyways, I figured my AF was just a couple days late so I waited and now it is the night of the 16th and still nothing.Also I have been having a milky white/watery discharge no smell. Any ideas of what this could be.I have no cramping or anything like that and it was weird leading up to when I should have started I had no backache, headache, or cramps as I usually do premenstrual,I am not on birth control to miss any to mess up my cycle and I have had the same sleep level,physicality level,no weight gain or loss, and normal amounts of stress that I usually have, in saying that I mean to say that nothing about me or my environment has changed.So I have no idea what this could be.I am 21 and sexually active. Please help/Any ideas?