What next?

Je

Hi friends. I have a very easy 28 day cycle that varies by one or two days sometimes. But currently late by a week. Neg test this morning so now I am wondering if I should go to gyno? Or is this something you wait out? It’s never happened to me aside from being pregnant so I’m unsure. I am cramping a ton w low back pain for the last three days but not even a tinge of blood. What are yalls experiences?