Xanax in 3rd trimester

Who takes xanax or knows someone who took it while pregnant? I've been on it for 6 years and my OB and family doctor said it's safer for me to keep taking it then to quit especially quitting cold turkey I had bloodwork done and baby tested negative for down syndrome and negative for all other kinds of things , he was perfectly healthy and I just got ultrasound done a week ago and doctor said everything is healthy his spine heart brain activity everything. I'm so thankful!