Help, Chin fell out of cage

I took my boy out of the cage for a couple minutes i put him back in and as i was closing the door he jumped out into the door head first then fell on his back from the top level of my critter nation cage. he didnt make any noises he isnt limping or acting really odd. i pet him and felt around and he hasnt acting any different when touching him but as soon as i put him in his cage he started turnign his head to the back shoulder and nipping at his fur over and over then stoped. I also still had his bath in there from couple mins befor and he jumped in his bath and started rolling around then went and layed right back down.. he is usually up jumping around at this time not sleeping any opinion would be great. i dont no if hes hurt or not