My last period was around November 20th 2011, its now Jan 30th 2012 and still haven't had a period since that day in November. Except for when I have intercourse I bleed some. I have endometriosis and my dr found cancer cells in my cervix but removed them by doing an loop. But I have been trying to conceive since beginning of Dec an up until then I have never missed or had an irregural period. But I've took a home pregnant test and it came back negative. Wonder what it could be?