Dear sister the problem with depression is that we got life in it. What I mean to say with this is - we got times where we live in depressive feelings bringing more depressive feelings into us because over the years we have build ourselves that way.
Having a depressive illness, I, after 10 years of constant depression, had life in lovelessness, ungratefulness, guilt, shame, fear, faithlessness, anger, bitterness, unforgiven issues, addictions, hopelessness, despair, doubt and suicide.
It took me years to die to those emotional powers over me, for I had to let Jesus build me a new self where I coped differently with my depression then I had in the past.
For example did you notice that when you gave your depression over to God in faith that you felt a lot better for as long as you did that?

This is the beginning of a new stronger life in faith and with God. The thing to do is to keep struggling for faith, love and hope when you are back in your bad life and so slowly dismantle your godforsaken life with a God filled life.
Over the years Jesus managed to kill my bad life in doubt, shame, guilt, my unforgiven issues, hopelessness and despair and replace those emotional forces with positive things such as faith in God's loving good and hope for better to come.
I still struggle with fear, suicide, fatigue and lovelessness though I have made massive head way and those emotional powers are not near as strong as they used to be.
Please dear struggling sister be of good courage. Know that bad life cannot beat God's good life -
rather empty yourself of bad life by slowly filling yourself with His good life
Keep looking in faith at our ever loving God and let Him place His New life where the old life is now, slowly replacing bad life and its misery with His good life making you strong and much more able to deal with the forces depression fires at you.