Hee hee, I have 2 different dates, an ultrasound date and a midwife date.

The u/s date is a few days earlier, so I go with that so it seems like my pregnancy is progressing faster, and I go with the later midwife's date for the hospital so there will be less pressure to induce!

There is not too much time between your different dates anyway. Maybe ask your dr/midwife which they suggest you go by.