Spinal defect, downs and trisomy 18 test

I had this test done friday when I had my anatomy scan done. I just got a call from my OB counselor and she said everything was negative except for Down syndrome. I have a 1:190 chance of my baby having downs.. they're sending me to a larger hospital an hour away to have a level 2 ultrasound done. I've done nothing but cry and worry and wonder where I went wrong.. I know down syndrome babies are gifts, and can still have a wonderful life, but this is news no one wants to hear... any advice or stories about these tests being false positive will be wonderful. I just need my mind to be put at ease a little until then..