If you can't feel an egg by doing an internal exam then it may be a shell less egg in her system. They are really difficult to pass and it really can knock them out of sorts. A direct calcium supplement to help with contractions and boost her shell gland for the next eggs coming through and just make her comfortable and give her time.
Hens go broody when you don’t want them to… and won’t go broody when you do.
gave her a bit of baby ibuprofen and a nice soak.. tucked her in for the night.. now all I can do is pray she passes it in the night. Oh and I did another feel for the egg and I still can not feel anything. 
