Ok ladies. Help a sista out!

Em
Okay so apparently I started my "af" but it's COMPLETELY different than usual. I'll run through everything. 
9 days ago I started cramping - NEVER DO
8 days ago I got a faint positive
7 days ago I got a negative. 
Yesterday I started my "af" with no cramping at all, and it's super light. 
Tonight, starting about around 2, I started having back pains (I NEVER GET THEM, ever)
And now, about 2 hours and still going... I am FREEZING. I live in southern Virginia. It's 80 degrees here and I am wearing sweatpants, a fleece sweater and three blankets. 
My question for y'all, is it possible that I am pregnant even though my "af" appeared?
I doubt it but I need to ask. Y'all are some sort of experts. Helpppp!!!