In his book In An Unspoken Voice (p. 135), Peter Levine says:

(Traumatic) memories are encoded not primarily in the neocortex but, instead, in the limbic system and brain stem.  For this reason behaviors and memories cannot be changed by simply changing one's thoughts.  One must also work with sensation and feeling--really with the totality of experience.

Has anyone ever told you to just change the way you think to get out of a difficult emotional time?  We oftentimes need something MORE, something physical to help us.  Chiropractic can help break the cycle of repetitive negative thoughts by changing signals to the brain.