I've suffered tremendously from over active energy in my brain as a youth. From depression to attention disorder to insomnia from being stuck in my thoughts.
It sounds like to me that there is an imabalance of energy in your body that is causing an unpleasant relationship between your consciousness, thoughts, and mind.
Yoga will bring you into the present moment, where thoughts cannot cause you any discomfort. It will also balance out any energy issues.
I'm guessing that you could experience many radical healings within a few months just from steadily practicing yoga every day. Radical healings have been my own experience in this area, which stemmed from consistent practice, most important of all, a genuine desire to love myself and heal.