Brown CM. implantation??

So I'm awaiting to see if I start AF. I'm not sure when I'm supposed to start exactly. I think it was supposed to be like 2 days ago. 2 days ago I felt like a peed my pants and went to check and it was CM and I wiped it off and light pink was in it. Nothing else yesterday or today. Then Tonight I was checking my CM and it was like a medium brown. What does that mean??