Hi Sabrina,
It would be simplistic to think that doing peaceful things can take away severe anxiety in the short term, because it just can't.
However, we know that meditating and breathing does help for most people (including me), and the other quiet pleasures are still there when we come back from our hard place.
In a strange way, I found that having an anxiety disorder has made me more aware of the peacefulness in the world, when I am able to connect with it. It's not all bad, even with the illness.
Cheers, M