I'm sorry for your loss. I lost my Mum 2 years ago and my Dad a few months ago. I also lost one of my closest friends 1 week before my Mum died. My Mum's passing completely broke me so I can understand you feeling empty, broken and sad. I was still completely broken when my Dad died.
I don't have the answer as to getting back to a normal life or how long that will take, we are all different. It's something I'm still in the process of attempting to do. Some days are better than others. They say that time heals all wounds but I don't think that's true. I think we just slowly become more accepting of the loss, I don't know that we ever truly heal.