ladies, im seriously in tears right now..

I had that scan done at 12 weeks, and i havent been back to the doctors for the results yet.. but coz im only 21 i thought id be ok.. now something on the telly was on about increase of birth defects etc, and how if the thickness of the measurment they take is greater than 3mm that your chances of your baby having a adnormality is greater..(sorry i cannot spell)..

Well, i looked on my U/S that i had done, and it said the measurment was 0.11cm...

What does this mean?? Oh god, im so stressed .. im really upset.. oh god.