You cannot get the egg out you may break it. Give her the calcium if she hasn't laid by morning go to TSC and get calcium gluconate it is the best for getting an egg moving.
This is what you want...
Take one crush it up real good and put in some water if she is drinking if she isn't put it into a syringe and give it to her by mouth. Here is how
https://www.backyardchickens.com/articles/safely-administering-oral-medications-to-all-poultry-and-waterfowl.73335/