Abnormal bleeding with a negative pregnancy test can mean a few things: 1) Possible ECTOPIC pregnancy which may take longer to show on a home pregnancy test but can still be quite deadly, especially if the pregnancy is in the tube, it can slowly grow until the tube ruptures; so get a blood pregnancy test to be certain. 2) Missed ovulation from the prior menstrual cycle would result in an inability to trigger a normal period. Anovulation or missed ovulation by definition is an Estradiol dominant situation, building a thicker lining in the uterus which then gets too thick and starts to bleed a little before the remainder of the lining becomes unstable and then it will trigger heavier bleeding that may go on for days or weeks until ovulation and hormone balance ‘resets’ regular menstrual cycles. If this type of abnormal bleeding happens more often, then ask your doctor to check your blood values for Estradiol and Progesterone on d21 of your cycle with d1 being the first day of your ‘regular bleed’. When bleeding is abnormal, then have your doctor help you determine when is the best time to actually get your bloodwork done. Remember, knowledge of your hormone levels is one of the only ways to really know what is going on.
I lay out in my book, Full Bloom how the menstrual cycle works and what abnormal bleeding can mean; Full Bloom is available on Amazon.