Sounds unnerving. Well first off all is she eating and drinking? Is she moving ok?
I've had a hen that had poop that looked like egg white, there was alot of it and she started acting depressed, and sulking etc. It turned out she had egg peritonitis, I brought her inside to keep warm, originally I thought she was egg bound (her sister died from being eb) so I treated her for that, no luck...took her to the vet and they prescribed Baytril 22.7's pill form (its difficult to pill but worth it.) in a 14 day dose. She cleared up after about 4 days, and it took her awhile to be totally normal, and about 16 days after being better to lay again, as of now, she's one of my best layers ::knock on wood::.
If you can find a small animal vet around, even if they don't usually treat birds, you can ask for an appt. so that they can prescribe you antibiotics, it will cost you, but if she is your pet it'd be worth it.
If it is a broken egg either she will expel it herself in small bits, or you can have a vet remove it. You can try to do it yourself, but it probably wouldn't do much good, just introduce more bacteria. You will see significant degradation in her health if it is, it causes infection, if it comes to that you may have to put her down.
BUT a fall should not cause an egg to break, unless it's from VERY high. I'd try antibiotics.
Someone else will come along and they may be able to offer up some ideas on more accessible antibiotics.
Bring her inside, make sure she has food and water, and a small roost.
Good luck, keep posting if you don't get a response soon!!!