Hello! Recently About 2-2 And A Half Weeks Ago I

Hello! Recently About 2-2 and a half weeks ago I had unprotected sex with my partner, and about 6 days after that I started having really dark almost black discharge for approximately 2 days, but no blood. I had basically no cramping nor did I have 'period' symptoms like I usually would get when I get my period, on around the 3-4th day I got really light and minimal brown discharge with a few spots of blood. Is there any chance this could be implantation bleeding? As ive had no blood since nor have I got my period