Having become Catholic about 10 days ago, I went to Confession the second time yesterday at the cathedral of my Archdiocese after work. I was really just going there to receive absolution after I checked the website to see when there was someone available. But the surprise was that I had unintentionally gate crashed the Archbishop’s 75th birthday Mass with 25 other Bishops and a Cardinal in attendance, so I stayed for Mass after confession.
Back to confession: After I left the confessional to do the assigned penance, I noticed I hadn’t confessed the number of any sin I confessed. From what I understand, we must confess kind and number of mortal sins. The priest didn’t ask how often I did something, so I assume he understood it as “once”. There was nothing that was more than twice, I think, but I still wonder whether the absolution was valid if I forgot to mention the number.
One extra question: What if I am not sure if I forgot a mortal sin? Would that be forgiven too? I received Communion right afterwards at Mass, therefore, if it wasn’t forgiven, I would have committed another mortal sin, right?