Remember that when the sacrament of penance is not available, one should present one’s sorrow directly to God and say a good Act of Contrition. Sins, including mortal ones, are forgiven. When opportunity arises, mention the latter in your next confession just to keep yourself honest. A very simple Act of Contrition that is found in the Rite of Penance is: “Jesus, Son of God, have mercy on me, a sinner.”