Constipation?

Hey, again Everyone! I have possibly a weird question. I've had my bearded dragon, Reptar, for a week an a day now and he has only pooped once. I don't know how often they are supposed to poop but I feel it should be more. He doesn't eat a lot either. When he is on his rock he lifts his tail in sort of a curled motion. Yesterday he didn't really move much and when I held him this morning he just laid on my hand and I was flat palmed and paying attention to something else and usually he's running up my arms and such. Now he has jumped from my hand, bed, and a chair before. Which is what makes me cautious when he's not in his cage. He also usually runs right onto his rock when I let him into his home. But this morning he just stayed on my hand, I felt loved but at the same time I am worried. Please help!!!

Uh-oh, I hope it's not impaction. What do you feed him/her and how old is he? Also, we need a complete run down of set up (lights, UV, food, size of tan, enclosure, etc)
And here is the page about impaction: https://www.beardeddragon.org/articles/impaction/

I gave him the juvenile food pellets and calcium covered crickets but I don't think he has ate them yet. His tank gets to 90 and a bit over I know its supposed to be higher but I don't know how to make it warmer I run 2 lights during the day. I don't know exactly how old he is maybe a couple months? It's a 20? gallon tank? I can pictures of anything you need to see here in a little while.
He is super tiny and fast. His belly isn't swelled any, It's super soft.