Period and pregnant?

Elizabeth

Hey guys,

I think this is the right place to post this, if not let me know. This is supposed to be my period week and I got it. It's just been really light like just slightly pink when I wipe. I wont be graphic but today should be day 3 and normally day 3 is so so so much worse flow wise. I took a pregnancy test and it came back negative. Should I take another? Any clue as to why my flow decreased to nothing?