I started cramping a week before my period was due. I was spotting for two days then I began to have heavy bleeding for two days. After the two days of heavy bleeding I began to spot for two days and then nothing. I took a pregnancy test and it was negative. My mom and sister thinks it may be to early to detect pregnancy but i think I'm not..although the period was not as heavy as I'm used to and the fact that I don't usually get cramps during my period. Should I take another test? Is something wrong with me?