Mumbai marathon is only 4-5 days away now. You need to take it very easy during these few days before the race. Even if you are not doing it and training for New Delhi Marathon, which is in 7 weeks time, take this week easy.
What you can very easily do in the last week before the marathon in your eagerness to train, is injure yourself. If you haven’t trained enough, please don’t risk a permanent injury. It might be better not to run. Think long term, not just about this one race.