A concussion cannot be treated. I had obvious and prominent one for almost a solid month after a car accident where I hit my head on the ceiling of the car. They tell you for the first day or so to try not to go to sleep because you can have a bloodclot, but when you have a concussion, sleep is all you want to do.
I’d say try and stay awake for the first day, or as long as you can, and have someone check on you and wake you up several times the first time you sleep. After that, I wouldn’t worry about it, just let nature take its corse. There’s nothing else you can do but wait it out.