Instead of feeling your feelings of sadness and pressure and talking them through with those you trust you've been trying not to feel sad and criticizing yourself for feeling overwhelmed. This has escalated your feelings of depression into your body and your life so that you have become depressed and are not your self anymore. You need help reversing course so that you stop using food and sleep to avoid your feelings and instead get support with your grief and adjustments until you recover your energy and zest for living. I talk with many people like you who have become depressed as a reaction to transitions, losses, injuries, or traumas. There's a big difference between care and fixing.
Care is patient with the process, fixing seeks quick solutions.
Care is respectful, fixing is shaming. Care is compassionate, fixing is rejecting. Care is helpful, fixing is hurtful. I encourage you to get help now before your depression becomes even more debilitating. Feel your feelings.