Thanks guys. Maybe this will help (and I beg you not to admonish me, I know that this was completely stupid and I don’t know what I was thinking at the time):
My thought at the time:
I’m more worthy to do the Consecration than a Roman Catholic priest.
My confession:
- that a Byzantine Catholic layman was more worthy to do the Consecration than a Roman Catholic priest.
Complete and utter folly, I know. And I’d really rather not revisit this one. So do you think it was valid?*
Well, I can’t say definitively whether the Confession was valid or not…but my hunch is no, because you withheld an important part of the sin. It is perhaps more serious when it’s about you, because it adds an element of pride.
I won’t admonish you

but I do think you should go back to the confessional, re-state the sin properly (that you thought YOU were more worthy…), and explain that you confessed the sin previously but withheld that it was about yourself.
If it was just a weird oversight in the moment, the withholding is probably not mortal…but probably ought to be confessed to be on the safe side. If you were intentionally withholding part of the sin for some reason, however, then that’s a mortal sin in-and-of itself and definitely needs to be confessed.
Either way, the best way to put your mind (and soul!) at ease is to go back to the confessional and do this right, so as to remove any doubt. In my opinion, if you confess and have any doubt as to its validity, something didn’t go right. There is no shame in doing it again to eliminate any doubt.
God bless you!