I understand, at least to some degree.
I just went through approx. 15 years of a black hole in my life, one where no meds helped and my docs had no idea of what to do.
I was also in chronic pain, which could not be controlled with the strongest pain meds, etc.
The medical problems, the chronic pain and the depression and c-PTSD just kept reinforcing/triggering more of one another. It has been a nightmare.
I am having a better summer since changing meds around (again). My docs said they had no major hope of a change for the better. Yet, here I am, feeling quite a bit of improvement this summer, much to everyone's surprise.
I look back at that period, those years of such a deep, dark, hopeless chasm and shiver, wondering how I made it through? I wonder how my loved ones stood by me? I can only recall parts of that time.
I know I have grown as a person and have more insight and wisdom than before. I know I have grown spiritually, as well.
I hope you can hang on, keep trying treatments and can also find some reprieve -- soon.
My heart goes out to you, Dear Soul!

WC