Due date changed with 2 weeks behind!

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Hi everyone! So I went back to the doctor today to read my ultrasound that I had yesterday! She said that our baby looks perfect! I was 16 weeks 2days pregnant according to my last period and due Oct 22nd! Today she said that according to the ultrasound I am 14 weeks 2 days and due beginning of November!

I am really upset and I need to hear other women's experiences! Why does the due date change? And how did it work for you in the end?

I am a first time mommy and I am kinda terrified, so your answers will be very appreciated! Thank you! 😍