Last month I had a very short and light period that only last 2 days. This month my period was late 4 days and now I only have brown blood and it's super light and sometimes spotted today makes the third day of the brown blood. I took a pregnancy test two days after I missed the first day of my period and it was negative so I really don't know why I'm not having a normal period. Also I have no pms. Should i take another test now?!