I read somewhere, from an elite athelete and can't remember which one, that she has all sorts of strange sensations and feelings in her legs in the taper before the marathon.
If in doubt, rest up.
I've just been for my last mini long run - 1 hour - my hip decided to make itself known, my knee, a toe. But it's all just concentrating and focusing I think.
It's all about positive mental attitude now. You CAN do it. You've done your training. You're committed. You're fit. You're injury free. You're fine.
VLM is my first marathon too. I've been plagued by injury. But am trying to put all my doubts out of my mind and concentrating on mental stratagies!
Best best of luck on the day!!