20 week scan.

Hey ladies just a quick question

Can you get your 20 week scan done at 17 weeks and 6 days. I have it booked in for Friday but Im 18 weeks the next day Saturday by going by due date as I realised I booked my scan in a bit early bubs is measuring 2 days ahead so I will be 18 weeks and 1 day going by baby’s measurements do you think they will do it? I asked my doctor and she said it’s fine this is our rainbow baby so just want to make sure everything’s ok xx

Thanks ladies x