if she is strong she should be ok, do you have an update? try electrolytes to give her a boost when she is able.
this is a paste from what I just told someone I do on another thread....
there are several recipes for electrolytes in the Hatching 101 article, also my main concern is infection of the navel, I use veterycyn umbilical gel spray, its expensive but well worth having on hand. This protects against infection as well as dries the yolk and the umbilicus stump. I would love to see an image of the yolk if you can, its always better to help with images, plus I love to see new hatched chicks period! If you don't have veterycyn to speed up drying and prevent infection, swab some diluted tamed iodine onto a raw umbilicus or unretracted yolk sac as the Hagen Avicultural Research Institute suggests . Be it in the brooder or hatcher, what is most important is the most clean environment you can provide until its umbilicus is proper. And I wouldn't worry about it being alone for now, the more it gets active be it upset at being alone or not, it is managing its metabolism and helping the retraction/absorption process along. Good Luck with your new little one!