Maybe she got injured while riding a horse. In many stories, horse - related accidents can cause pain.
If it's an illness, they could search for a cure. Maybe there's a special herb or a magic spell in the world of the fanfic that can heal her. Her friends could go on a quest to find this cure, and in the process, there could be more character development and interesting plot twists.
Another possibility is that she got into an altercation with someone. Perhaps there was a conflict with another character, and things got physical, resulting in her getting hurt. However, without more context from the fanfic, it's hard to be certain.
It could be due to an injury like a sprain from falling off a horse. Horses are a big part of Amy Fleming's world, and accidents can happen easily.
It could be due to an injury like a sprain from a fall while riding a horse, which is common in her character's activities. Maybe she overexerted herself during a long ride.
I'm not sure if there is a specific fanfic directly about Amy Fleming and extreme pain. It could be a very niche or even something created by a small group of fans. You might try searching on specialized fanfic websites or forums.
Definitely Ty Borden. He and Amy have a special relationship, so he would be deeply concerned about her illness. He could be the one running errands, getting medicine and making sure she has everything she needs. Georgie could also be a main character. She could be helping Lou with the ranch work and also spending time with Amy, telling her stories to keep her spirits up. And then there's Spartan, Amy's horse. Spartan could be acting strangely because he senses something is wrong with Amy, and his behavior could be a part of the story as well.
Another possibility is that she's been under a lot of stress lately. There could be a lot of things going wrong at the same time on the ranch, like financial problems, problems with the animals, and then getting sick on top of all that is just too much for her to handle, so she freaks out.
The plot could involve Amy Fleming having a mysterious illness that causes her to cough, and her friends and family are worried. They try to find a cure while she continues with her daily life, struggling with the cough.
She might rest. Just taking it easy and staying off her feet for a while can help reduce the pain. This gives her body time to heal.
If the pain is severe, she might have to seek more professional help. In the fanfic, this could mean finding a healer or a doctor. They might prescribe some herbal medications or perform a treatment like acupuncture if that's part of the fanfic's medical practices. She may also have to limit her physical activities until her leg heals, which could be a big challenge for her active character.