I think she is just stressed over the changes in the house. 6 weeks is not a long time to have a cat, and she is still getting used to everything and now everything in the house has changed - including her food. I think she will settle down once the house hold settles down. And you and hubby will get to know her "signs" of when she is over stimulated and to then just walk away and not play with her anymore. She will eventually learn that playing rough like that is unacceptable.

I don't have any advice really, except to be patient with her and like I say, once the house settles down, she should too. And she may never become a lap cat, but you'll find that just having her near for an occassional skritchie is really nice too.