Is 11 DPO to late for implantation?

Ok so I’m 11 DPO and according to glow AF should arrive Tuesday. I had some light cramping this morning and went to the bathroom about 2 hours ago and had bright red blood when I wiped so I thought for sure that it Was AF arriving early and put a pad on. However, just went to the bathroom now and pad only had a tiny brown mark and when I wiped I only got a little brown cm and it seems to have stopped. Could this be implantation? Isn’t implantation bleeding supposed to be only brown spotting and not full red blood? I’m confused...