I am suffering from constant bombardment of past abusive thoughts. I feel like taking revenge from someone who had shouted me or abused me or made fun of me in the past since my childhood to till date. Once i see or listen something relatable or when i am alone eating or driving, those thoughts jast suddenly appear and changes my mood.  my heart beat rises i looses my concentration try to shout and abuse them, and regret that why i could not answer them at that time itself. I am suffering from this from last 4 years. Intensity of this problem varies time to time. Please help.