Implantation bleeding 11dpo?

Currently 11dpo and still getting negative tests, AF is due on Wednesday. I wiped this morning and saw a small amount of light pink watery discharge. Just wiped again and now have a small amount of brown discharge (pic in comments) Checked my cervix and it’s so high I can’t really feel if it’s soft. Experiencing light cramps/twinges, which I have since 8dpo. I usually don’t spot before AF and if anything it’s a day or so late, not 3 days early sooo….could this be implantation bleeding even as late as 11dpo? If you had implantation bleeding, can you share when you had it and then when you tested positive? Thanks!