I came across your post this morning and I know it's been about a month, so I'm not sure if you're feeling any better yet or not. I lost conjoined twins in April at 12 weeks and felt much the same way you do, in trying to find a reason why it happened. I know everyone is different in their dealings of death, so there I can't tell you what would make you feel normal again, but I can tell you what I've done.
Because I had to have a D&C to remove the babies we decided to have the remains cremated, and put in a little urn. We had discusses taking it and spreading the little bit of ashes somewhere nice, but at the time I couldn't part with them, I needed them near me. Because my husband is not hot about the idea of an urn sitting around the house, I keep them in the memory box (box of ultrasound pictures, the positive pregnancy test, the pregnancy journal I had started, etc.) I had started for them. The box was in our closet and whenever I missed them or was sad I could go visit them. And I know it may sound a little morbid but just holding the urn and looking at the ultrasound pictures made me feel so much better. And over time I have stopped needing to visit them so often now, but if I do they are still there and I can have time with them.
If I could give any advise, I would say that you need to take your time and find something that is going to work for you to get you through the grieving process. Don't worry how odd it may seem to other people, and don't put stock in the crazy looks they give you. No one knows what it was like to carry that baby but you, and no one knows what it was like to lose that baby but you, not even other women who have lost babies, we are all different. If you are sad one day, be sad, and don't apologize for it. If you are happy, be happy and stay in the moment. Be whatever emotion you feel, it's natural to be emotional and all over, that is a grieving process. But if I can tell you anything not to do, don't let guilt have a place in your mourning. There is nothing you could have done that would have made it any different. That baby was going to be in your tube regardless of having a drink before you found out or an x-ray. None of that caused it. It just happened, it happens to many women, without reason.
Try to stay hopeful. It may be hard now, but just tell yourself that you will get pregnant again and you will have another perfect baby. I don't know if your religious or not, but faith helped me through. Knowing that maybe this just wasn't my time, but when it is that God is going to bless me again with a pregnancy and children that I will cherish them even more because I know what its like to loose one.