I always think it's weird that a stranger can shed a tear for someone else through the internet, but I am. I am so, so sorry you are going through this.
The first time I lose a baby it was a missed miscarriage at what would have been 3 and a bit months. the people who helped me through were a moderator from another preggo site who had delivered her fullterm stillborn son a few months before, and a friend of mine who had suffered a miscarriage before.
Grab whatever support you can, when you feel you need it. I sat at home with my eldest (I had become a single mum while pregnant with number 2) listening to Enya over and over (I'm a hippy folkpunker...?) and cried and cried for a few months. But I got over it eventually. I had my son named and cremated. I scattered him in the sea at Brighton.
Be strong. Whatever your feelings about your baby, it might hit you at some point. Good you have your mum there for support.
Much love and healing vibes to you xxx