You are doing all of the right things for her! Unfortunately once a fish has started to pinecone it usually mean that they are going into organ failure.
Here are a few facts about organ failure from my website
"Dropsy isn’t a disease, but rather a symptom of other underlying problems, and there is no single underlying problem for every case. A fish with dropsy will be obviously round and swollen, particularly around the abdomen, the swelling causes the scales to stick out, and when viewed from the top the fish will resemble a pine cone. Fish suffering from dropsy are often lethargic, poorly colored, and uninterested in food.
The symptom that we call dropsy is essentially an accumulation of fluids within the body. As the body swells the scales are forced out, causing the pine cone appearance. The most common causes of dropsy are bacterial infections caused by poor water quality and maintenance, certain viral and protozoan infections, and organ failure.
Dropsy is extremely difficult to treat, by the time the fluid in the body has built up enough to cause the scales to pine cone, Severe internal damage has already occurred. By the time it gets to this point it’s usually best to euthanize the fish. You can try treating with Anti-biotics, epsom salt and increased water temperatures, but most of the time these treatments do not work, and you are just prolonging the suffering of the fish!"