She'll be fine until tomorrow, so if you feel it i the right thing to do to let her settle again then try again tomorrow, I would go with that. How are you moving them? I tend to find the easiest way (sorry if I am teaching my granny to suck eggs!) is to pick up the lamb by the back legs, then sort of walk/drag lamb along with front legs on ground, head facing ewe - lambs should bleat, ewe can see/touch lamb, and almost always follows either to new space, or into trailer, depending on how far we are going. Doesn't sound very nice when I describe it like that, but it is only for a very short time and does the job.