That is a really physically traumatic loss for a first trimester miscarriage. I had a 12 week miscarriage and I was shocked at the amount of blood, but like most early losses, I did not end up in the hospital like you did. I would assume that makes it even more difficult. I hate that they put you where you could hear babies. That is awful. I am sure it was terrifying for your husband, also, watching you lose all that blood, as well as his child.
Like Jessica said, losing a baby is overwhelmingly heart wrenching. Even if it is an early loss, it was still your baby and that baby held a place in your heart and your dreams for the future as soon as you found out about it. You are allowed to feel whatever you are feeling. It wasn't your fault. It was nothing you did. And remember, your hormones will take a while to adjust, so they are exacerbating your strong emotions right now.
Allow yourself this time to grieve. Grieving is painful. And yet, its necessary. You have to go through this stage if you want to heal. But remember while you are going through this pain that it won't stay this paralyzing forever. You will eventually begin to feel better. You will feel joy again, I promise.
It is great that you reached out to us. It was helpful for me to talk with other women who could relate to what I was going through. You can find a pastor or therapist to talk with also. They might be able to help you get through this initial really hard part. It might be helpful for your husband, too. FWIW, my husband and I named our baby. We didn't do anything formal. Some people do more. Whatever helps. But we just felt that a loss without a name made it abstract, and kind of minimized the very real pain we felt. So we gave our baby a name. And that at least gave me something that felt more palpable to grieve.
APA has a page about miscarriage. It might be helpful to read through it. It has other helpful links as well.
After a Miscarriage: Surviving Emotionally