Aw, do not feel like a failure, unfortunately these things happen, often no reason why, it is very sad, for you and others that have miscarried, I have a cousin her first baby miscarried, she of course was devastated, time passed on , now she has 2 little boys.
Please do not feel you failed with this, sometimes no matter how much a person does like they are supposed to, things can go wrong. My heart goes out to you, do not deny counselling if possible, this is a very fragile time.

((((((((((((((( in the dark ))))))))))))))