Late!!

Caitlin • Married 6 years, 30 years old, working hard ttc my rainbow baby💚

I am currently 4 days late (I have regular cycles and have never had a cycle this long). I finally broke down and bought a test and NEGATIVE! My boobs are swollen and heavy and I’m having on off light back cramping. Anyone have this happen and turn out to be pregnant despite the test? Trying not to be too optimistic because our Ttc journey has not been fun so far but like I said never late!