Implantation bleeding?

Hey! I’m currently 13 dpo, and I have been having this light pink/light red/rusty brown spotting the past 2 days. It has been constant all day with EXTREME cramps, I’d like to say the worst cramps I’ve ever had. I’ve never noticed spotting before so that’s why I’m worried this may be implantation. This has been going on starting on 4 days before AF, and we’re now on 2 days before expected AF. It is when I wipe sometimes the rusty brown, sometimes the light pink, sometimes the red(like in the picture), and on my underwear. No other physical feeling than cramps but that’s like every other AF. Please give me some news!!! Thank you!