Tested positive for neural tube defect

****Update****

Had my ultrasound yesterday and turns out baby is just fine. I will be watched more closely in the 3rd trimester and have weekly ultrasounds to keep an eye on baby.

Today my test came back that I was positive for neural tube defect. I’m not 100% sure what that means? I’ve googled it and I’m still lost. My doctor called and said they wanted to do an ultrasound to confirm and we would go from there. This is my 4th baby and have never had this problem before. Has anyone tested positive but everything was fine? Any advice or experience would be helpful. I’m really scared!