Like Ghost that haunts you from the past

There are many times or moments of solitude when I sometimes think about the mistakes that I have made in my life ...I sometimes think that I have already done my time in terms of being sorry for myself...feeling remorseful why I have done such things and i would believe that I have paid my dues with regards to these mistakes...but still there comes a time when I am face with a very difficult situations or experiencing great difficulties in my life that these mistakes go back to my thoughts to haunt me ...is this my karma? have I not done enough good deeds to have paid for my dues???Have I not suffered enough for my mistakes??? Have I not been set free from these thoughts...have I confess my mistakes more than enough to not feel guilt...or to carry such guilt all these times even after the years have pass???Is it a continuing learning curve for me that my past mistakes is a historical marker or milestones in my life so that I would not forget not to repeat such mistakes ever again...How Will I be ever to expel these ghost that haunts me or will I have to live with them for the rest of my life...