Oh, I'm so sorry to hear that I will keep her in my thoughts.

And sorry, I have no idea how you can help with a constipated cat... I know I usually eat prunes but I don't know if that would work with a cat. I think that it's just best to wait for the xray results and not give her all these stuff to help her constipation cause it might just get worse. Like if she gets diarrhea from something you give to help her and she becomes all dehydrated and so on... Of course I'm not a vet though, this was just my thoughts!

Keep us posted please.