Hi, I am G3P2@27 weeks + 5 days. In my first trimester, the doctor noted that my placenta was posterior and low lying. However, during 2nd trimester, I had at least another 2 ultrasound scans and the doctors have said that the placenta was posterior and not low lying anymore. Apparently today I have another scan and the doctor said to me that I have type 3 placenta previa. I am shocked, and worried. Is it possible that this is a wrong diagnosis?