Implantation bleeding at 11dpo?

TTC no 2 after a miscarriage a couple of months ago. I'm 11dpo and been testing since 9dpo (silly I know!) and all bfn.

Did a frer this morning and bfn. Then had a bit of brown blood in my underwear - sorry if tmi! So thought great it's af.

There's only been diluted very pale pinky brown when wiping since. Just took another frer as 11dpo is much earlier than when period due and this spotting is unusual and I think there's a faint line? See pic.

Is 11dpo too late for implantation bleeding? Had some crampy feelings yesterday on one side almost like ov pain so I'm thinking it may just be af on its way?