Nuchal fold increased thickness

Chloe
Hello ladies. 
We had our first ultrasound yesterday at 11w 3days. Baby's nuchal fold measured at 4.4mm which we were told indicates a very high risk of 'something' being wrong. We have to go back again on Wednesday for a more detailed ultrasound and they took bloods yesterday but I'm just wondering if anyone else has experienced something similar and what the outcome was? X