You've got to replace the "fuck it all" feeling with grim determination to get through this. This could be the hardest thing you've ever done, but if you've ever learned how to push yourself in the gym, ever gone for that last rep that you didn't think was possible, then you've got the tools you need to get through this.
It's like working out: find out what you need to know about strokes, and recovery, and then start applying that knowledge with discipline. It's so devastating because you care so much for your mom. Take that caring and apply it to a solution and the road to recovery.
Next Thanksgiving, you'll be amazed at what you've accomplished.
Stay strong. Now more than ever.