The very best thing you can do, IME, on a new injury is apply ice: 20 minutes on, then let the area return to normal temp. Then again. And again. 3 cycles of this 4 times a day, and you will limit the damage.
The other thing is to prevent any motion/action that results in pain. IMO if you let it hurt, you are furthering the damage.
RICE is also an important part of recovery.
When I follow this advice, I recover remarkably quickly--even since becoming a geezer.
Good luck--injuries suck.