There are priests who would give their left leg for altar servers who took sin as the serious thing that it is, and who took the necessity of confession seriously.
Who should be more embarrassed, after all: the man who sees his doctor for a self-inflicted gunshot wound, or a man with a self-inflicted gunshot wound who is too proud to have it seen to? Maybe the wound is something to be embarrassed about, but getting it seen by a doctor is the right thing to do. There is no shame in that! OTOH, I know of pastors who would rather that those on the parish staff have other priests as confessors…they want to be certain the person is absolutely free to say what they need to say, without any fear or shame.
Feelings are what we feel, and there is no shame in them, but I don’t think the Lord was ashamed to see you there, serving at the altar only after having sought and received absolution. I think He was rejoicing, and all of Heaven with him. Remember the parables of the lost sheep and the lost coin…
If the Lord rejoices in us, that is all that matters.