Fetal Fibronectum Test (FFN)

Kelly
Has anybody had an FFN test done I've had nothing but problems in 2nd trimester.  I had a cervical cerclage places a week ago and at PO apt a failed FFN test which detects premature birth. Came back positive so dr says I have 30% chance of having Braxton within next 2 weeks!!! I'm freaking out of course. Has anybody had any of the same problems?