Implantation bleeding? Early AF?

So I’m just a mess. I believe I ovulated around October 1 based on OPKs (I’m REALLY bad at temping so this is all I got lol). BD practically every day of the fertile window. Yesterday was 10 dpo and when checking cm I noticed that it was brownish- figured it was af and put on a pad. Overnight through today there was nothing on it and very minimal when I wiped, only when I went to go check for cm. Is this af coming early? Could it be implantation bleeding? Help 😭