Part of her never wanted to let go of Morgana, afraid that if she did she would just disappear again. She did not want that to happen. Knowing that she had let some strange sickness, Merlin never fully explained what had happened, knock her down and resulted in Morgana being taken hurt her so much. She felt so guilty. She was meant to protect her and yet found herself waking up in Morgana's bed after feeling ill. She didn't know what had happened between then, but she knew Morgana was gone when she woke.
"I'm fine," she said with a nod, agreeing that she was safe.