Baby too low for scan

I have been having growth scans to monitor baby. But today at my scan 39+2 days. The midwife said baby’s head was to low to be seen or measured on the scan. So now they can’t make a decision on what to do now based on babies side. As baby was measuring 3 weeks ahead at all previous scans.

Any idea on what they will do! I’m due sunday

Thank you x