He's still getting used to his new home and will probably be restless for awhile. As long as your temps and humidity are fine and you're offering secure hides it isn't anything to worry about I would leave him alone with no handling for several days and that should help him calm down.

Oh, and if they told you that your red-tail was a "dwarf" then she's probably a Hog Island or a Caulker Cay, and those females usually grow to about 5-6 feet. Pictures would be the best way to tell