This could mean anything. If it stays light it might just mean implantation is going on. I'm going through something similar. I am 6 wks late. I took 3 hpt that came up positive. I started spotting Friday but by Monday afternoon I was bleeding with moderate cramps. I had blood work on Monday and I can see my results online. It says my hcg qualitative test was negative so I am super confused and discouraged. I have an appointment tomorrow so let's see. The light period could mean anything. Many women have full blown periods for months and are still pregnant.