late period & don't know what the heck is going on?

Jazzlin • Mommy of 2 ❤️ wife'd up by my best friend 💍👫 New Mexico 🌵
I'm 5 days late & 19 days post ovulation. My period has always been super regular and I can't seem to understand what's going on with my body. It actually feels like I'm pregnant but my hpt have been negative this whole time. Anyone been through this?