4 days late but not even a faint line

Valerie • Pregnant with #2, working full time, and google certified trainer! Like to stay on my toes ;)
Ttc and I'm never late for AF... I'm 4 days late with occasional light cramping, but nothing like I get when it's arriving for real. Tested without even a faint line, I'm just frustrated! Either show up or give me a positive!!