amniocentesis done today so unexpected :(

I had the worst day so far I'm 18 weeks and today I went to the high risk doctor because I had some blood work and came back I had varicella in it and my doctor sent me to the high risk to get more detail ultrasound. When me and my husband went in the doctor for something wrong in my baby's brain and kidneys so they did the test today to further check for Down syndrome or more birth defects.  They already had done my blood work for that and it came back negative for that. Just such a sad day today knowing something can be wrong with my baby.