Need help because my OB was useless

Carol

I went to the OB today because I was experiencing bleeding since Friday( nothing too bad more like a light period). My OB couldn’t really explain much to me just that the baby was healthy and it still had a heartbeat. She seemed more annoyed than usual and I felt rushed and couldn’t ask much questions. She didn’t explain this ultrasound. But what is the round bump on top of my baby’s head? That was there before does anyone know?