Spotting

11 dpo today, and last night before bed I decided to check my cm, and I got quite a bit of pink cm, and my cervix was sore to the touch. My heart kind of sank.. Well yesterday morning I felt a really sharp pain and then nothing besides an achy uterus. This morning I still had pink spotting, but it was turning brown. I decides to check once I got to work about an hour later and this is what I got..

I am feeling some minor pains now. AF is due on Monday. Should I still test tomorrow, or prepare for AF? I keep telling myself I am not pregnant, but I still feel very nauseous which I have had since 7 dpo...