Fortunately, the open window was a misdirect, and Selina was still in the room, standing and walking on her own.
All signs pointed toward Selina getting worse, and she ultimately needed to be sedated… until Bruce glanced in her room and saw her bed empty and the window open.
The seed seemingly backfired, as Selina quickly began violently seizing.
She told Bruce that she felt no pain anymore, and she felt better even than she was before she was injured in Jeremiah’s twisted Killing Joke-esque attack.