The Black Cats almost threw away a two goal lead at Loftus Road on Wednesday but Wes Brown's first goal for the club ensured they snatched a last gasp 3-2 victory.
Having come back form the dead against Blackburn at home to pull out a win but suffer a late reverse at Wolves, O'Neill is already being put through the mill.
"I did miss nights like this. I enjoy the winning of games. You do go through turmoil. If you have won it is worthwhile, if you lose it is a sickener," O'Neill said. "The points are of paramount importance and the performance was excellent in the most part but we lost concentration when we scored our second goal.
"The referee injured himself and we had time to reflect on a 2-0 lead and lost concentration. We had chances at 2-2 and there were two great saves from their keeper. It crossed my mind we might not get the points. We have won two out of three and that is encouraging.
"They are still getting to know what I demand. The one thing I haven't any complaints about is the commitment of team."