6 days past AF due date...

Hey, I need some help! I'm on day 38 of my cycle... I haven't been any longer than 30-32 days since stopping BC and that was in May. 
I had a chemical pregnancy my last cycle. No symptoms now of pregnancy or period but all I have gotten after 6 tests this month are BFNs!!! I just started feeling some kind of cramping, however light, today. Is this normal? Could I still be pregnant?!