Latitudes points are individual. The number of points you earn depends on what offers were available at the time. For example, you used to get an extra point for booking 9+ month out. You get an extra point for a suite and another point if you book a latitudes offer, so its impossible to say how many you should have, other than that your wife would have significantly more than you.
Your biggest problem is that NCL don't now go back more than 12 months when looking for past cruises missing from your history, so unless you have detail of latitudes numbers that were related to those cruises then you are likely out of luck.