Mild cramping no AF, could I be pregnant?

My AF is due today (per glow) and I have had BFNs for the past three days including this morning. Starting about Thursday or Friday of last week I had some minor cramping that kind of felt like pre period cramps. They come and go and are mostly gone today and still no period. I waited until this morning to take my test and was disappointed it was negative. Do you think the cramping is for AF or could I be pregnant?