The word trauma means wound in Greek, and that's what being traumatised really means; to be hurt or wounded. That's why for me there is no such thing as a small or big trauma, you either feel traumatised or you don't, feeling traumatised can only ever be truly 'measured' subjectively.
Silvia Hartmann has really great exercises for anxiety and stress that utilise the power of the heart and Bellruth Naparstek has a really excellent guided visualisation for healing trauma that helps us explore our broken hearts. It might sound cheesy or corny, but think of it. A little child whose parent has betrayed their goodness and innocence, is that not akin to having had their hearts broken?
Our wounds are often the openings into the best and most beautiful part of us ~ David Richo