Oh yes... some beardies can stay stressed when they first come to their new home for up to 3 weeks ive heard so i wouldnt worry about 3 days
Just let him get adjusted for a week or so then start trying to handle him if you think hes getting to stressed out..
Im sure you will notice a difference in after having him for a week.. I sure did with my litle Falkor.. He still doesnt like the giant hand but once i have him in my hand hes a little sweeheart and isnt too skiddish..