Freaking out

I am 19 weeks pregnant and had a quad test done because my horizon test came back not enough fetal cells. The quad test shows a 1 in 19 down syndrome chance. Can this test be wrong? Is there anymore tests to be done instead of the amniotic? I'm devastated. They didn't check my baby at 10-14 weeks they only controlled my sugar. On one hand I don't want to do the amniotic test because of the miscarriage risk but then again I want to know. I've had 4 miscarriages and this is the first baby I've carried this far. Prayers please! It's going to be a long weekend until my Dr appointment Tuesday.