help tmiii!

Can you get implantation bleeding/spotting even if you aren't ovulation? When I wiped I had a light Orange or light brown discharge. I tested with an opk to see if it was ovulation bleeding/spotting but I wasn't ovulating according to opks. So what else could it be? It was 10/11 days after af. This happened on 11/3 I tested for pregnancy but don't think i see anything. What could it be please help.