Firstly can I say how sorry I am that you find your selves in this situation, sweettea. It sounds pretty awful.
I am not sure how bringing a pup into your home at such a fragile time can make things better, and it hasn't, has it? I am sure you intentions were all well meant.
However, in my opinion, and it's very much that, I feel you ought to find a new home for the pup (ideally somewhere closeby, where you might be able to see ddog), and try to improve the mental health of your family.
We all love our pets, but as such siedaisy experienced, it only raised anxiety levels. And that cannot be helpful.
I wish you good luck, and hope you can find a way to move forward.
Perhaps you could find someone whose ddog you could walk on a regular basis, so you can enjoy the therapy that being with an animal brings without the complications of owning one.
(((Hugs)))