Math?

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Okay so I'm by my due date I'm 22 weeks & I'll be 23 weeks Saturday. My doctor told me at 21 weeks last Friday that I was measuring 23 weeks then. I turn a new week every Saturday. How much would I be now & what would be my due date if she said I'm already measuring a week or so ahead which is fine but she won't change my due date cause it's not two weeks measuring ahead it's only a little over one.