Confused 🤷🏻‍♀️

I hate the "could I be pregnant" posts, but I'm super confused right now. I have irregular cycles and so its hard to know when I ovulated. Well on the 6th I *believe* I did. Now today I had light pink/brownish spotting only when I wipe. If I did ovulate on or around the 6th then it's about 11 dpo. Could this be implantation bleeding? Otherwise what could it be?