I just went to Confession today, and right as the priest was beginning the formula for absolution, I realized that I truly had left out an important detail concerning a sin I confessed. I thought about interrupting to tell the priest, which I've done before, but I kept going back in forth in my head rapidly thinking, "Should I interrupt or is it that big of a deal?" Then, he got to the more necessary part of the absolution, and I just kept my lips shut. As soon as I went for the door, I thought, "Man, I should have spoken up. Why didn't I? I'm going to regret this." I went back to the priest and said, "Fr., my mind isn't at peace, I don't think I confessed with sufficient detail." So, I re-confessed my sins. But, after leaving the church, I remembered two other serious sins that I completely forgot to confess, and I realized that I hadn't even mentioned making an invalid confession within the context of the Confession itself. So, I went on with my day hoping that I could go back to Confession some time soon. Thankfully, another church was having Confessions in the later afternoon, so I went. I entered the Confessional saying, "Father, I actually went to Confession once today, realized that I gave insufficient detail right as the priest was beginning absolution, and I hesitated to interrupt, so I think I made a sacrilegious Confession." He told me it was not, but I still wanted to Confess at least that I hesitated to interrupt with an important detail (if that's necessary). I proceeded to tell him that there were two sins that I completely forgot to Confess. He told me that they were already forgiven, so he was just going to give me a blessing instead. But, I said, "But, Fr., I've read that you still have to confess forgotten sins." He insisted that you did not since it's already forgiven. But, I said, "Fr., can I just bring them to Confession now." He replied, "Do you understand me? You do not need to Confess them. They were already forgiven." I will admit that I have some scrupulosity that I wrestle with from time to time. I felt kind of anxious at this point, so I finally said, "Yes Fr., but can I at least confess sins that I have committed since my last Confession?" He allowed me, so I did confess some venial sins. Then, I said, "And, I also committed these sins... [which I told him... then saying:] which I forgot to Confess in my last Confession." He asked, "Those were sins that you committed before your last Confession?" Then, I panicked that he might become angry with me for this, so I quickly thought of something to add quickly to this and said, "and I think that pondering over those sins may have caused temptations for me today." That wasn't exactly true, which I felt bad about later, but I guess I just panicked. He then almost seemed to have sighed a little and told me to pray a Hail Mary. He then gave me absolution.
But, after leaving I thought, "Did I make it seem as if I believed that I had not made an invalid (therefore, sacrilegious Confession)?" I concluded that I kind of did make it sound so, though I did not believe so. So, I wondered if this actually counted as Confessing the sin. I then realized that the priest may have believed that I was finally following his advice about just forgetting the forgotten sins, and maybe he thought that I wasn't intending to include them in this Confession... which might explain why my penance was so small.
Am I obliged now to bring all of this to Confession again?
I'm so confused, and I don't know what to do. I just wanted to lay it all down in Confession, be done with it, and move on away from it. I just want to do what I'm obliged to do. Do I confess again?
P.S., I know that I'm a scrupulous person, but I think that I truly may have had valid reasons to bring all these things to Confession when I did. I don't think I was truly being scrupulous this time, but I don't want to become to scrupulous now, while I also want to do what the Church obliges us to do.
Nevertheless, if we happen to recall an unconfessed mortal sin, we are called to confess it. As the Code of Canon Law provides: The faithful are bound to confess, in kind and in number, all grave sins committed after baptism, of which after careful examination of conscience they are aware, which have not yet been directly pardoned by the keys of the Church, and which have not been confessed in an individual confession (canon 988 §1). The late eminent theologian Father John Hardon, S.J., elaborates further on this issue in The Question and Answer Catholic Catechism (New York: Image Books, 1981): Must we confess grievous sins forgotten in a preceding confession? We must confess grave sins forgotten in a preceding confession because, according to divine law, every known mortal sin committed after baptism must be ‘submitted to the keys’ [cf. Matthew 16:18-19; 18:15-18], that is personally acknowledged in the sacrament of penance (no. 1373, p. 273).