Is it possible to implant at 6 dpo ?

I am confirmed through tests that I am 6 dpo. I wiped this am and got this brown type of cm. I have never had this before…. But thought maybe old blood from ovulation…. Only I wiped later on in the afternoon and got a very light pink/stretchy cm. I am still spotting but like I said just a drop here and there and very very light! Is it possible to implant this early ? I sometimes spot a day before af shows but never 9 days before af shows !!!