Abnormal ultrasound :(


I had an ultrasound yesterday at 9 weeks 4 days. Baby was measuring 10 weeks 1 day. Everything looks great and I thought it went well! My OB called me today to tell me that there was something abnormal they saw on the ultrasound but baby is too small right now to know what. So now they recommend me get the NT scan on the 30th :( I’m so nervous. I hope my baby is healthy.