I am happy to hear you're following up. Even if what is happening is not real, it is real to your daughter and can be very frightening. There could be a physical cause, such as from the injury, or it could be part of a mental health condition, such as severe depression or schizophrenia.

I hope things work out for your daughter. It is great that she has found you to be a trusted person to talk to. Kudos to you for being a great parent.