That could be the anxiety, or it could be the meds. Wellbutrin is a good antidepressant, but it can cause anxiety because it's stimulating, so that could also be a possible factor. I assume you're in therapy because of the addictions; your therapist should be able to show you breathing exercises and you can also try meditation to get some relief for that anxiety. There are also natural remedies you might try, either herbal or amino acids or homeopathic, that work on GABA sort of how benzos do. To learn more about that there's a book called Natural Highs by Hyla Cass, a psychiatrist at UCLA. You have to be careful, though, with contraindications with what you're taking. And others might know more about this, but klonopin doesn't really act very quickly, it stays in the body a long time, so it isn't as likely to be abused. You might discuss this further with your psychiatrist.