Could I still be pregnant

I had light pinkish bleeding a week before my period was due, which was Jan the 9th and it didn't even last a whole day, it was only when I wiped and it was gone after that.  My period was due January 15 but I had some light bleeding 14-15 and my cycles normally last for 5 days.. But it only lasted two days. I've been very tired lately and my boobs hurt a little and not to bad but I've also picked up an appetite. I took a pregnancy test and it said negative. So is there still a chance I could be pregnant.