Brown CM 11 DPO, AF or implantation?

Tine

Hi everyone! I'm really confused with my cycle. I got my IUD removed Dec 30th during my fertile week. So at first, I was expecting AF Jan 15. On Jan 16th I got EWCM, so I took an ovulation test, which was positive. So now I was expecting AF around the 30th. However, today at 11 DPO, I experienced some light brown CM. What does this mean? Is AF early, or is this implantation bleeding? I was always very regular before and had a cycle of around 27 days.

Please give your opinions! TIA!

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