If your body unaffected by Nuvaring naturally had 28-day cycles so accurately that you could set your watch by it for years and years and this had all happened at a time when you had no influence of Nuvaring, then one could say you would be expected
to ovulate on 6/6. But unfortunately, you were just off
Nuvaring, and cycles can take a while
to adjust when you are out of its influence.