Not a marathon runner but feel that I have enough experience of long distance/time efforts and illness to weigh in.
Imho, all you can do is rest, be kind to yourself, try not to worry and make sure you eat and drink as well as you can and go into the day with an open mind and give it your best shot. You've been training for however many months with a goal in mind...goal anxiety is real. Don't let it grind you down. Listen to your body. If you feel good to do some shorter runs closer to the time then do. But the main thing is rest and recovery I reckon.
Not a marathon runner but feel that I have enough experience of long distance/time efforts and illness to weigh in.
Imho, all you can do is rest, be kind to yourself, try not to worry and make sure you eat and drink as well as you can and go into the day with an open mind and give it your best shot. You've been training for however many months with a goal in mind...goal anxiety is real. Don't let it grind you down. Listen to your body. If you feel good to do some shorter runs closer to the time then do. But the main thing is rest and recovery I reckon.