The above means: no sense of remorse until the worst.
I remembered the phrase being uttered by one of my previous Chinese teachers who was scolding us for being unconcerned with our Chinese assignments.
Anyways, the semester is going to end in 2 days time and I still felt no sense of urgency in doing anything at all. Forgive me, but this semester is a morale buster. & I admit that I let myself fall victim to this feeling without trying to get back up again.