P.S. If you think a itchy arm-cast after the second week is bad, try a full length leg cast after the second Month :D ... been there, done that, hate the T.Shirt...
Hmm,
Either way, they will have to look at that hand... Doesn't sound like it's getting any better inside the cast.
I would suggest you get back to the ortho. And don't worry about it. I am sure they will have a nice laugh about the whole affair ;D.