What the bible says about forgiving yourself

Is "self-forgiveness" a scriptural idea? This isn't the place to go into details, but certain events and circumstances have left me carrying a heavy load of guilt. I believe in Christ and His death on the cross, but in this case my beliefs don't seem to have the power to change my feelings. If you knew my situation, you might understand why. People tell me that I need to "forgive myself," but I just laugh when they say that. Who am I to "forgive myself?" And where does the Bible ever tell me to do any such thing? I've searched the Scriptures over and can't find anything that supports this idea.