BFP? Late implantation ?

Rosalie

I started testing at 8dpo many said all the test looked like indents. I am a POAS addict so I took many. I decided to stop and wait till AF showed. She never came and I’m 18dpo now 4 days late so I tested this morning. Is this positive? Could I have implanted later around 10/11dpo?? Also it’s much pinker in person!