I personally would always play it conservatively so close to a race, especially if you have a history with injuries.
The long distance endurance adaptations and durability takes a long time to develop, so you should be proud of the work you put in so far this year; the hay is in the barn! There is almost nothing I see to be gained in terms of endurance with 2 weeks left and a lot to potentially lose.
So I would personally focus on the quality of each run (without overdoing it) and recovering in this final phase.