No, This was not nearly enough force to cause a concussion. The slap to your skin would be uncomfortable but the bounce/give in the ball would negate/cushion any force from the speed of the ball.

BUT, if you are concerned about another concussion, you should not be on the basketball court. The common concussions from the basketball court are head to head impacts and falls to the ground.

I addressed this situation on 5/18. Look back in the thread.

Have you done any math drills in your head to strengthen your skills?