I thinks it's both. Personally, something "always" triggers my anxiety. It doesn't just come out of nowhere. I was talking to my Revovery Pastor who explained to me that he was addicted to alcohol and drugs. He was willing to change but he didn't know how. He had to learn how not to be addicted to drugs and alcohol. He has been advising me through my depression and anxiety and says that I am addicted to worry and it's not unlike an alcoholic. I do believe that we can change these things but shouldn't beat ourselves up because I believe it's chemical or genetic too.
DX: chronic migraine, cervical degeneration, depression/anxiety
RX: Wellbutrin, Lexapro, Soma, Immitrex
"You don't find out that God is all you've got until God is all you've got."