I am considerably older than most of you, probably, and I've battled with anxiety for most of my life.

During the 80's, when antidepressants were all the rage in the medical community, I was mis-diagnosed as depressed as opposed to anxiety alone, and was given a slew of antidepressant pills that basically fucked my brain chemistry for a very long time.

I do believe that Paxil is the devil.
It permanently alters your brain chemistry.

I also take Klonopin, but not on a scheduled basis, just as needed for panic attacks that get out of hand.
Bud helps a lot, but mostly meditation, quiet reading, and yoga. The combination of yoga and buds have literally saved my life, not to mention the lives of countless people around me!

There is no cure for anxiety / panic attacks.
You just have to train your mind and body on how to deal with them when they occur. It is a very personal experience, and therefore each individual suffering from such should have a personalized plan of action; something that works for you, something that you're comfortable doing.

I would advise that you stay away from antidepressants as they are terribly over-prescribed for things that aren't, by definition, "depression". To take them without actually being depressed would be like going through chemotherapy and not having cancer. It fucks you up. (not in a good way)

Perhaps bud would be more beneficial for you if you refrain from sativa, and also indulge in some yoga and / or deep breathing exercises PRIOR to smoking.
Good luck.
Namaste.