Honestly, don’t do it, a bone graft needs way longer than 3 weeks to heal.
It’s easy to say it’ll only be a few lines but we all know that’s never how it goes. Bone grafts can be difficult to heal normally never mind putting pressure on your system with coke and whatever else.
Seriously, not worth it, please give it time, truthfully they can take like 3 months at minimum to heal so you’re still very early in your recovery.
You do not want to experience a failed bone graft, I promise you.