I had a very similar situation rip open my life in Feb 2007.
My mother was diagnosed with cancer on Jan 10th and spent the next 3.5. weeks in the hosiptal. She celebrated her 31 year wedding anniversary with my father sitting upright in a hospital bed.
When they let her come home in the second week of Feb she was almost back to normal and we were advised she had up to a year.
On the 16th she collapsed, and refused to go back to the hospital saying she wanted to die at home with her family. There really was nothing more the hospital could have done as they actually escalated her condition (whole other story; really not in the mood to get into) so we waited with her saying out last words until the 17th of feb when she passed.
There is not a day that goes by that I dont think about and missher. I was extremly close to both my parents, but I normally saw my mom more due to her nurse work schedule.
I cried then, and sometimes still do. Hell, reading this thread made me tear up.
There is nothing wrong with it, and you are obviously not alone.
Keep your head up and remember all the good times. Know she is with you and will always be watching. I find it hard to believe sometimes but then there are times that I need to believe that.
I'm sorry for your loss and you and your family are in my thoughts.
-Marc