14 days late but not pregnant?

Skyler • Mama of 1👶🏻💙

So I just took this pregnancy test and it obviously indicates negative but I’m 14 days late for my period?

Does anyone know any reason for this? I’ve been cramping and getting back pains as if I’m on my period but haven’t bled at all.

UPDATE: I got a blood test done the following Monday to see if I was pregnant and got AF an hour later that day☹️ Don’t know why I’ve been so irregular