Treat yourself the way you would a small child. Feed yourself healthy food make sure you spend time outside. Put yourself to be early. Let yourself take naps. Don't say mean things to yourself, don't put yourself in danger. (Your skull heart are still as fragile as eggshells)
There are many reasons to feel grief- not just when someone dies. When a dream dies... a lost relationship... a huge life change... So be kind to yourself. Take time to mourn and mend. And fill your life with as many sweet and meaningful things as you can, finding joy in the small, simple delights around you. Life IS good. GOD is good, and He loves you. In this world you will have troubles, but with God you will overcome them all.