Hi there, I suffered from major depression about ten years ago and to be honest, I can't remember much about that time. I was under the care of psychiatrists and psychologists and took antidepressants (I didn't take antipsychotics but it was discussed). For me what was most helpful was the psychologist. Once I was out of the depression what became key for me was to be able to identify when I was on the downward slope again and to get help in time to stop it from progressing.
For me, there was no shortcut to making me "feel better", it was so gradual, until one day I realised that it had been a couple of months that I hadn't cried or had suicidal ideation.
The pain of it is exquisite, there is nothing like it, you can't move for the heaviness (or nothingness).
All I can say is that I know it's possible to get through, and that I think it's a very personal journey though it. The only way out is through, and even though the pain is overwhelming, it doesn't last forever.
A combination of medication and talk therapy is what helped me, if you need inpatient speak to your doctors about it.
Sending you lots of love OP, I know how absolutely awful and bleak it can be, but I can also promise that there is a life worth living at the end of it xxx