In the face of uncertainty, there is nothing wrong with hope.
The question you need to ask yourself is not if you will heal, but how you will heal.
When you're depressed, the whole body is depressed, and it translates to the cellular level. The first objective is to get your energy up, and you can do it through play. It's one of the most powerful ways of breaking up hopelessness and bringing energy into the situation.
Healing is simply attempting to do more of those things that bring joy and fewer of those things that bring pain