Please read - Cramps

Liz
Hi everyone. 
I'm 7dpo, and for a few days I have been getting slight cramps. It was switching sides and still is a little, but today it's like a stabbing pain on my right side off and on. It feels like O cramps. Has anyone had experience with this?
I also have pressure in my uterus like right before my period starts. 
Here's my chart for reference. Just curious if anyone else is in the same situation or has been before.