Hi,

well I know you've already had lots of responses but I thought I would add my 2cents as well. I have gestational diabetes and one of the things that can happen is your baby grows fast and gets big (which has happened to me) I didn't have to have scans though until my fundal height measurement was over, another lady at my hospital has gd too but her fh measurements have been fine so she hasn't had any extra scans.

It will just be to check the size of your baby given that you are measuring 5 weeks ahead (just a common standard practice kinda thing) if it was anything more serious I'm sure they wouldn't leave you 3 weeks before giving you a scan and they would have told you if they had concerns.

I can completely understand you feel a bit worried so if you still feel uneasy I think you should just call your hospital and ask them to clarify exactly why you are having a scan.

Good luck with everything and congratulations also