Sorry for the downer thread. I know this should be an up or happy board.
Thank you for sharing and you need not apologize because this is supposed to be a "happy" place.
These boards are meant to be helpful, not just sugar coated nicey nice.
Depending on the size of the community you live in you may have a number of choices of support groups. I know in my area there are many grief counseling services. I suggest you ask your wife's nurse about this as she probably knows more about it than does her doctor. If she can't help contact the hospice office. I hope you are making use of all the free services available.
No one can know exactly how you feel but I'm willing to bet she is as concerned about you as you are about her. Since the two of you have some time together it is something you might start together.
You don't have to do this alone and times like this well meaning family and friends are not necessarily the best people to talk to.
Please post to us, as you are able.