She feels...

I wrote you a little story on what she thinks:

She felt her chest contorting, the pain like a knife. what was happening to her? She dared no longer to dream of a future. No one knew what was ailing her, yet you could see her fade away. Till she was akin to glass. Breakable and so pale and thin...
She watched the sun play trough the large window next to her bed, it was spring outside now. She could remember lying in the fresh grass watching the sun trough the dancing leaves. It had seemed as tough she were under the water, the fracturing light that she looked upon. Her sister had been sitting next to her softly singing her to sleep. The bedroom was light and friendly but she somehow longed to be outside. To run with her sister and then play in the grass. Just that.
Her chest was pierced with pain again and she had to lie down this time. She was no longer thinking:"When will I get better?" First she worried that summer would be over as soon as she was better. Now she wondered "Will I get better at all?" She felt tears form. She would never see the outside world again. She'd never properly enjoyed it before. She couldn't even say a proper goodbye to the trees and the garden. Not ever again watch the sun trough the leaves.
"If only I had known, I would've looked better, lived intenser. But what child thinks that she might not see another tomorrow"