Low PAPP-A Level at 1st Tri Screen

I just got the results back from my First Trimester Screening. My NT fluid level was low/normal (1.4) and my HCG levels were normal (80th percentile) but my PAPP-A level was very low (6th percentile). She said this raises my Down Syndrome risk from 1 in 166 (I'm 37) to 1 in 81. I am going back to the hospital today to do the next step, give blood for the Cell-Free DNA Testing (the newer blood test you might've heard of that looks at pieces of your actual chromosomes). Are/have any of you been in the same boat as me and/or do you know of any stories and outcomes? I greatly appreciate your input.