The beardie looks very healthy, he's just going through relocation stress. So try not to get too worried and again I'd advise to hold off on a vet visit until he's bigger and has settled in. If he hides too much you can take out the cave and just put it in at evening time. BTW, what insects did you end up getting ? Always be sure they are smaller than the space between the eyes for a baby beardie. Once a beardie is past the baby stage, in the 10-12 " range you can bend that rule a bit.