First of all, I wish you the best of luck with the battles you're going through. I know it might sound like nothing, but posting about your journey and challenges might help someone out here, so post when you feel like not keeping it in and putting them out there.

It is incredibly valuable for me to read about the first hand experience. Ketamine clinics, let alone ketamine therapy, is not legal in most of the world. Ketamine in high doses for anaesthesia is legal almost everywhere. I remember reading about ketamine nasal sprays - they also had a positive effect on depression and ptsd, over a longer period of time.
Ketamine therapy has shown promising results when done under proper supervision and by professionals. I hope you feel better and better with the upcoming sessions. I know I will be eagerly waiting to read how it makes you feel.