I'm not going to take my wife back to the hospital
What is the reason you would not take your wife to the hospital?
The x-rays and the other laboratory results were clear. She's a hypochondriac
You should be more understanding of your wife and be there for her when she needs you. Your wife will resent the fact that you are not caring for her and she will not be available for you when you need her to be.
I'm sick of her hypochondria, its fine.
It can be frustrating if the results show nothing. She might still be in pain and can't get a straight diagnosis. Sometimes conditions exist but they are so rare nobody considers them.