Take it day by day and don't let anyone else tell you otherwise. The pain is greater the tighter the bond. When my father died and in the months prior to it, I did not allow myself to grieve because I was doing a variety of things to spend time with him and to ensure his care. I was completely in shock when he did die because at the fairly young age of 63 and knowing that he was a kind and good hearted man, it was unfair.
After the shock of his death wore off I slowly began to act upon how I felt rather than how others wanted me to. If I did not feel in the mood to go out, I didn't and vice versa. If I wanted to cry I cried like a baby, sometimes I still do and it's been years. Not a day goes by that I don't think of him, just yesterday I was laughing with my sister about some of the funny things he said and did.