You might try taking ginkgo too. Regarding severe anxiety, Klonapin is a very strong drug. There is not natural treatment that is equally effective. Kava is somewhat effective for anxiety, but it doesn't approach the strength of Klonapin. Also, you have to be very careful about getting off Klonapin.
Alternative medicine is a huge field filled with a lot of junk.
It isn't always easy to find which parts really work. The best way is solid research. However, there simply isn't enough solid research to guide one completely. So what I did was convene a panel of expert alternative practitioners, selected for their hard headed, pragmatic style. In other words, I wanted people who were realistic, not true believers.