4 days late BFN

Megan

Y’all I’m never late. Like 28-29 day cycle and it’s here. We’re about to start <a href="https://glowing.com/glow-fertility-program">IVF</a> just waiting for AF. Now she’s MIA ?! 4 days late no BFP!!! What’s the latest past your period you got your BFP? How long should I wait before I call the dr??