I don't understand my doctor. I just don't want to go see her anymore.…

I don't understand my doctor. I just don't want to go see her anymore. My first birth ended with cesarean section, then the attending physician was another doctor. I went for an ultrasound on January 11th, the sonographer sets the term at 19-20 weeks. I come in for an appointment on January 27th and the doctor says 20 weeks ??‍♀️??‍♀️??‍♀️ well how is that so!? I'm worried because I have to undergo another C-section, the term is not correct as it should be, how can I get to the C-section on time with such a doctor? The embryonic term is now 23 weeks old, but according to