1 in 36 chance of Down syndrome

Had a scan last week and they said baby looked well chance of Down's was 1 in 10k. They offered Harmony to confirm results via blood test and check gender. today I get a call that the baby has no trisomy 13 or 18 but chance of DS is now 1 in 36 because something was weird in the blood. Have to see a genetic specialist tommorow but having major anxiety and tears. 
Anyone been through this?