Need a little nerve calming

I had my 12 week ultrasound at my MFM today. My NT scan was done and measured several different measurements (she kept taking it over and over which scared me.) The largest she got was 1.6 and the smallest was .96. The .96 was while the doctor was watching and showed her where to measure. I’ve read anything below 3MM is normal. However, my other measurements were done in CM. I forgot to pay attention to that one. Surely if my baby’s nuchal fold measured 1.6cm which would be 16mm, he would’ve said something, right? He asked if I wanted genetic testing but not for any reason other than to just offer it seemed. We don’t get after visit summaries. I guess I’m just needing someone to reassure me lol my anxiety is always so bad at the high risk doctor.