If you put your papers in a few months back, after getting a start date from an airline, it would make sense to withdraw your resignation and take up a 3-5 year contract instead of leaving. Even those in training at airlines already are on very shaky ground. Most airlines will be laying off pilots, and they will be the first ones taken on when things improve. Any start date that was given three months ago is now worthless and I wouldn't resign from a job on the basis that I would be next inline. The current hiring freeze will be an ice age.
Simple enough for you ?