I have anxiety, too, and if I ever could have found a legitimate indica down here (in the land of tropical sativas), I'd have liked to have tried it. A hybrid was what helped my sister's chemo/cancer anxiety a lot more than the sativa-heavier strains.

I keep my anxiety at bay with exercise because it works like a charm to chill me out. On rare occasions when it's really bad, I will take a klonopin, but I try to avoid those. When school pressure is lighter (like now), my anxiety takes care of itself. I don't smoke anymore for other health-related reasons, but when I did, the smoke aggravated my asthma, which also caused chest tightness, and asthma can sometimes enhance or exacerbate anxiety because it mimics some of the symptoms. So consider whether possible breathing trouble could be aggravating your situation, too, Prince.