I’m so so sorry for your loss OP. There is a specific type of shock in your situation, I know because it happened to me and my children - collapse from heart failure at work. It’s just too much for your mind to take in, this level of shock goes deep into the mind and takes a long time to process.
Don’t be surprised if this doesn’t follow a typical grief trajectory, for your or your dd, and don’t be influenced by other people’s ideas about how this should look. We were more ‘functional’ in the first 6 months, in some ways, due to the protective nature of shock, than we we were from the 6 months to the 2 year mark.
I had dreams, even years later, where it was all a mistake, saying that I needed to go and tell his work that it was all a mistake and he hadn’t actually died.
Sleeping with your daughter is a good thing in my opinion, very natural.
I’ll be thinking of you, and please remember just what early stage you’re at right now, and that there are people who have trod this path - even though that’s hard to believe at the time - it just doesn’t seem possible that anyone could truly understand, when you’re right in it