I don't really find the high cbd strains to be helpful. Blueberry, and some of the blueberry descendants (like the ever popular Blue Dream) have an amazing anti-anxiety effect, probably due to their unique terpenes. I have a neighbor with PTSD that swears by them, and also by a few Sativa landrace strains. We really don't know what is causing this anti-anxiety effect-some report they get relief from high THC strains, both sativa and indica dominant, some swear by high CBD strains, some by landrace strains. I recommend trying out each of these to find what works for you. I think it's a magical combination of terpenes that does it. Personally, I find relief from a lot of plants with the blueberry and strawberry flavors. A quality Blue Dream is a great place to start.