Cannabis is gentle (and healing) on the kidneys, and treats PTSD and many other conditions you're talking about here. I hope you seriously consider it. If you need help with information (from anecdotal stories to scientific studies) please let me know. It is even being used to treat alcoholism and the effects of long-term alcohol use, and it is a known neuroprotectant. CBD is great, but a full-spectrum oil (either vaporized or taken with food) would probably be best. Various strains offer various different properties because they contain a different cannabinoid profile. Until prohibition 100 years ago, cannabis was used all through medicine, and was widely known to be safe and effective. We made it illegal for some pretty dastardly reasons. The current wave of legalization is fake, just a government-backed corporate monopoly, with expensive low-quality cannabis. Kinda like they ruined the tobacco industry and made that plant extremely unhealthy and expensive. If you can source it outside the legal regime that would be best, but any amount, from any source, in any form, would probably do your body and mind wonders.