Opinions please! TIA!

Hi guys! I’m just wondering how late implantation bleeding can happen.

I’m 16dpo and yesterday I had three very small light pink blood marks on tp. And they were really small and if I hadn’t been looking I wouldn’t have seen them.

I never spot with AF but I thought maybe she was being weird this month, so I put in a liner. Well after those three spots there’s been nothing else. Just a lot of creamy discharge.

Anyone have any ideas?

Maybe I ovulated later than I thought?