Need advice +NS (3rd meet of my life)

I'm a newbie when it comes to meets and I missed my heat for the 50 free lcm. Luckily, there was an opening and I got to swim 2 heats later. I was told to tell the timer my name when I got to the other end. I did. In the results posted today, it says NS. Where did my time go? Will it ever show up? I wanted it to be in my results. Is there anything I can do? TIA