I know that you searched your soul long and hard to make this decision, and I firmly believe you are doing the right thing. This baby began in a world of hurt, and there is little sense in keeping him there, although I know you would have offered him all the comforts possible. He would have suffered way too much, and you right along there with him.
You are doing the right thing. Never second guess that, and no regrets.
My heart goes out to you! Give your little girl a big hug from me!
