@meh3 I really don’t know, but maybe see if your son can help you think through your options, and/or your doctor. You might also talk to Social Services.
I haven’t had a moment like you’re describing yet, but I have to keep reminding myself to pay attention when I’m driving. I tend to start thinking of other things & then realize I’m going too slow. Scary stuff.
Good luck, & let us know how you’re doing.