Help !?

beauty • Be you ✨ Be bold ✨ Be beautiful ✨

So my baby is suppose to be 11 weeks today (Due date may 1 2018) based off my LMP but on my ultrasound baby is measuring 11 weeks 5 days (due date April 26 2018) .. tech told me to go off the ultrasound for the due date .. what does your doctor normally tell you to do when baby measures ahead ?