My period has always ran like clockwork. Roughly every 28/29 I get my period. Well.. My last period started on 2/13 and I haven't had on since. I have taken numerous pregnancy tests and all have come back negative. For the past 5 days on and off I spotted I guess you would say. It definitely was NOT a period. It was only light bleeding, not enough to even wear a pad. It was only noticeable upon wiping. No blood clots and varied between pink and red and color. No real cramping or anything except for on the first day but even then it was hardly noticeable. I took another test today just to be on the safe side and still Negative. Any advice? I'm a little lost here seeing as this has never happened before (never missed a period or was late). I'm also not on birth control.