AF 8 days late.. Negative test?

Ok ladies.. today I’m officially 8 days late. (My cycle is on an average of 39 days) I tested last Saturday, it was negative. Tested Tuesday & it was negative. Tested again yesterday (Friday) & still negative! 🙄 I’ve been getting some slight cramping but it normally goes away after I eat or go #2. I’ve had some fatigue & some small cravings. That’s really about it.. is it possible I could still be pregnant? Should I wait another three days & test again or should I make a drs appointment for blood work? I’m driving myself insane! It’s been 9 months since our miscarriage. We are hoping & praying for a miracle! 😔