GM, I'm sorry to read that your mother isn't doing well and has been in the hospital. I do hope that she's home resting comfortably now.
I think it's a wonderful idea that you are wearing your grandmother's ring. She would have been so happy that you are doing so. I'm sure the ring bring you peace and some wonderful memories come to the surface to calm you.
I do understand your concern about your son's driving to school. I'm sure your son is very careful w/his "new" car and will be vigilant in watching for other drivers at stop signs, etc. At least by him driving himself to school, it will free you up just a bit.
You sound more balance and I hope you are doing okay. You've had a very difficult time of it lately. I am keeping you and your family in my thoughts and prayers.
Sit quietly, the answers will reveal themselves when you least expect them to. The past is gone, the present is a gift and you need to focus on today, allow the future to reveal itself when it is ready.