Fetal Brain Concerns

I am writing to find out more information on things to expect from my latest anatomy scan. I am pregnant with my 2nd child. It is a natural pregnancy after years of infertility & one miscarriage. I am 36 years old. I did NIPT & everything came back normal. I did NT testing which came back normal with a result of 1.9. Recently I went in for my 20 week scan. All was normal expect the baby has a mild enlarged right lateral ventricle. Currently measuring at a 10.3mm.

I was referred to maternal fetal medicine for a 2nd ultrasound. Has anyone dealt with something like this before? My rescan is in one week but I’m just nervous.