Girls, hello! Could you please tell me if my calculations are correct,…

Girls, hello! Could you please tell me if my calculations are correct, I think it's already the end of the 12th week of pregnancy, I went on record, but the gynecologist said to wait another two weeks before going to a private ultrasound for screening. (She counted it based on the ultrasound picture taken at 5-6 weeks). Then only will you come and I will put you on record, and I will give you a card ? I have resigned myself to the fact that the doctor is not so good. But the question is, is the screening ultrasound and DNA analysis too late?