I know this post is really old but I want to respond incase anyone else has this problem and is frantic to figure out a solution.

My baby beardie did that too when she was that size and I first got her. I did not know when I fed her that she would literally eat every roach that I stuck in her bowl at once. They were a small enough size but she shouldn't have eaten all of them. She rolled exactly like that for 2 days. I did some research and figured out it was the roaches choking her and or impacting. I got a bowl of warm (not hot) water and held her in it, then rubbed her tummy lightly from her head in the direction of her tail. I did this every few hours at least 5 or 6 times. I also made certain her basking spot was at about 110 degrees F to make sure she was warm enough to digest properly. I repeated the warm water soaks and tummy rub the next day. When I woke up the next morning she was fine and there was a large poop in her tank.

I hope things worked out with your beardie too.