Hello. My bearded dragon (age 2-3 weeks) is still stressed after 2 weeks of his new home. His stress marks are the only thing showing he is stressed, however. Appetite is good, basking is good, activity levels are great. I don't know if he is darker in coloration because... well, I have never seen him without his stress marks... If you need more info, I'll be happy to oblige.
Your baby is still extremely young. Are you bathing him daily and offering water orally via dropper/syringe? Those little ones can get dehydrated so quickly! As long as he is active, eating and pooping he should be fine.