"There is no grace for speculation."
What the speaker, Carolyn McCulley, was saying is that God gives us ample grace each day to face what he brings our way each day. But he does not give us "spare" grace for all of the potential alternative realities that we manufacture in our minds. God does not call us to live in the future, but the present. If (mentally) we run out ahead of God, we're on our own (in a manner of speaking) ... God's not in the business of battling imaginary spectres or windmills that we mistake for giants.
Part of our "daily bread" is trusting that God guides our steps one at a time. Each day has enough worries of its own, and the good news is that God does give us the grace for these!