Neck Hurting from Tubing?

Okay so, i went to my friends cottage the other day and we went tubing, turns out i fell off three times and i really did a number on my third fall. i skidded across the water and hit my head a little during the fall. it didn't hurt at first, but an hour or so later it started aching. I can turn it, but it hurts and feels sore whenever i yawn or move it. although, i can touch my chin to my chest. my friend said the same thing happened to her and it went away within a couple of days. Should i be worried about this? Should it go away anytime soon?