This could be due to constipation (how was the consistency of the solid part of the dropping?). Or, a cloacal prolapse could cause the constipation. It could also be a papilloma (wart caused by virus). There are some complications including nerve damage if cloacal prolapse is untreated.
My info is from Clinical Avian Medicine and Surgery by the Harrisons. I am not a vet, and this is the first I've heard of a cloacapexy. I'm just giving you a synopsis of what I have just read in this text. Please call your vet ASAP. My own suggestion would be to also make sure she's getting enough fruit right now. You might want to call the emergency vet clinic and ask if there's an avian vet on duty, and take it from there.