Zhao Ming always thought that it was all Wen Xu and Xiao Li's fault for making her life a living hell.
But since she came into this world, she realized that it was her fault as well. She was the Empress but she still let Xiao Li and Wen Xu trample over her self respect.
She could have retaliated and if she had dealt with the situation differently, then maybe the result would have been different.
Sometimes, many things one can realize only with time. There is no way she can go back into her world because she has no idea what made her come into this world.
She only knows that she fell into the pond and couldn't move her body because her body became paralyzed under the water and couldn't move herself to save herself to drown.
She knew swimming but still, she died by drowning in the water. That's why she doubted if she was poisoned which made her body become paralyzed and she couldn't retaliate and struggle to come up.