Girls, can you tell me, I'm 30 weeks pregnant. Yesterday I had a scree…

Girls, can you tell me, I'm 30 weeks pregnant. Yesterday I had a screening ultrasound, the doctor is very good, I only go to him, but yesterday she scared me because she says my baby's head is bigger and it's approaching 31 weeks, and the body is 30 weeks. She also has her hand cocked over her head, she says maybe he's comfortable with that + one-time umbilical cord wrapping, and lying his head straight under the ribs, the doctor says he will still adjust the position, but the head worries me, have anyone experienced this? Should I panic or not?