Sorry that I don't know anything about lactolose. Usually anything ending in -ose is sugar based, but hopefully your doctor took that into account since he knew you were low-carbing.

To update your profile, click on the profile icon to the right of the "This is sugar-free zone at the top of the screen. Then click the 'edit profile' option; make your changes; and click 'submit' on the bottom.

Good luck with your measurements tomorrow!