I read about the situation in your Sims thread, I was hoping the condition would improve. I'm sad to hear this, there's usually nothing like losing your mother.
When my grandmother died I got hit hard, but my mom got the worst of it. They were very close, she spent almost every day with her. Like you mentioned in the Sims thread, games helped calm me down, otherwise I'd just be thinking about her, and start crying again while the wound was fresh.
For me, I tend to think about making sure I appreciate and get my time in with loved ones while I have a chance, because we're all on a timer. It sounds like you did what you could, and you really appreciate her. She'll always live in your memories and the work she leave behind. (General advice, and from my experience) It hurts thinking about it at first, but eventually you will come to smile thinking about things that remind you of someone close to you that you have lost. You'll probably have dreams that you wish you could stay in because it seems so real, but it won't be your only dream so look forward to more, and more life experiences that make you smile because they remind you of the person you were lucky enough to enjoy while they were alive.
It will take time to transition into smiling when you think about her. It'll take time for your wounds to heal. I hate this process, and it makes me sad just thinking about how many more I'll have to go through, but this is life. Get your time in with loved ones and enjoy people while they are here, enjoy them while they're close.