Implantation bleeding?

Hello ladies, been TTC for the past 10m. Have any of you who have gotten pregnant spotted the implantation bleeding beforehand? Even if thinking retrospectively and realizing that might have been a sign? I'm 6dpo and already depressed because I see nothing so far, call me crazy, but I feel like if it's gonna happen, I'll see the implantation bleeding. To obsessed? Thank you and good luck!