with false pregnancies they can devolp milk and everything and yes gaurd things. even stuffed animals which become their babies. If I were you I would take her to the vet to make sure. Its better to pay the money for the x ray and not be preg than to have to pay for an emergency c section in the middle of the night. also if she isnt pregnant you wanna watch for signs of pyrometra.
http://www.thepetcenter.com/sur/pyo.html http://www.marvistavet.com/html/body...pregnancy.html
hope these help!!