It is possible she could still lay viable eggs. They have been know to produce offspring through parthenogenesis, meaning no male involved. I would get a second opinion at the very least. And do some research on parthenogenesis. Also it's normal for them to go off food while there in breeding mode all the way up until after they lay eggs and also there is a pre-lay shed. They normally lay within about a month of the shed.
you don't need an x-ray but instead you could have an ultrasound done.
Personally I would get a small incubator and supplies ready now just in case.