AF 10 days late and BFN 🙄

Hi girls, so I'm 10 days late and have been taking HPT the last 7 days and they have all been negative 😒 it's so annoying and the last time it happened was when I found out I was pregnant with my first (now 7 months). Since last night I have been experiencing some lower back pains and some cramping and for a few days I have been so tired which is out of the ordinary.. I'll hopefully go doctors tomorrow.. has anyone else experienced this ?Â