Ball pythons hide. It's what they do. Just like Kymberli said your snake was stressed from the move and that's why it was so active. Now it's settling in, which is why it hides. Ball pythons are nocturnal, so the only time you should see them out anyways is at night.
I'm also going to say you need to get Provent a Mite asap. It's the only way to go.
http://www.pro-products.com/index.ph...d=53&Itemid=59
I'd treat any other reptiles you have in your home so they don't spread. Read the directions before using it.