Oh hun, I am so sorry for your loss. I can't imagine what that feels like to lose a child. I do know however what it is like to feel hopeless...Heartbroken....Suicidal.
It's like your whole world has been shattered and you feel like you will never be able to put back together the peices.
It's only understandable and ok that you feel this way. You probably will for a while and that is ok too. It will get better little by little. And you can help that process by taking care of yourself...By being understanding of yourself...By being good to yourself. Talk to someone or look into support groups. Sometimes it helps to just talk about it and you may need to talk about it for a while.
And remember: it's not your fault. These things happen. And like I said, be understanding of yourself. Talk to yourself like you would a best friend. Would you think and tell your best friend that she must be defective? Well you aren't either.
So curl up on the couch with some tea and light some candles and make that dr's appointment....For your future baby, your fiance and you.