The Lord forgives all our sins. The littlest lie to the most horrible act of murder. Sin is sin in the eyes of the Lord. If you believe in him and ask for forgiveness and try to learn from your wrongs and not make the same mistakes habitually then you are forgiven. The slate has been wiped clean. Only by you holding on to it and giving it life is it still alive.

A good T or pastoral counselor might be a good idea. If you cannot find a peace with this.

Have you tried writing that lap in judgement and any others no matter how large or small on a piece of paper. Ask for forgiveness and give it to God. To no longer have ownership of your sins and wrongs burn that paper. Now it no longer exists, those sins no longer exist. You gave them to God. They are no longer yours. To prove it you have a pile of ashes. What once was is no longer. do not reclaim that burden. If you sincerely ask they you will be forgiven your slate is clean.