You didnt listen to anything anyone told you. They said to LEAVE it alone for a week. You said your only had him 5 days. Thats not a week. Have you fed him? If not then do NOT hold him until after he eats for you and then wait 2 days.
All your doing is stressing your snake out. Hes in a new place let him get used to the place before you go and start to hold him. If he hisses thats a sign of leave me alone, thats what i would do