I am 21 years old. I have always had a regular period. I was 5 days early for my mentrual cycle when I received my period this month. It was very light bleeding, almost not noticeable unless really looked at on the tampon. The next day my period was gone. It has been 2 days since it has be gone and I am not spotting or anything anymore. I took a home pregnancy test and it was negative. What could be wrong? Am I possibily pregnant even though my test was negative?