Becoming critical in the face of criticism, only inspires more criticism.
The journey of life is both too short and too precious to be sidetracked by guilt trips.
You can't 'cope with' change anymore than you can 'manage' stress.
Worry, shame, and fear can't be the energy with which we deal with food and weight. It only spurs us to eat more food and produce more glucose/sugar which gets stored as fat.
You never want to tie your responsibility to another's irresponsibility.
Stress is an indicator of our belief in the value and validity of our worries and fears.