I'm sorry to hear of your recent loss SG and can appreciate what you are going through.
Grief affectes people differently. My mum died last Sunday and on the day, I cried all day. However, over the past 3 days or so, I've been able to talk about her, arrange the funeral etc, without shedding a tear. I have my moments, when I think back to good times and I'll have a sob for 10 minutes.
I was very close to her and doubt a day will ever pass where I don't think of her. I think I find comfort in that I had her in my life for 40 years, despite her numerous health problems in later life, when I could have been like alot of people, who never get to spend time with their mother or lose them alot earlier in life.
It also helps that I have a very loving and supportive partner, had I not, then things would be alot harder. The funeral is next Friday and I know I'll be inconsolable on the day.