My daughter who has never stuttered in her life started to stutter and is still stuttering after a panic attack. She had the panic attack back about 2 months ago. All blood work and ct and nerves come out fine.
Is this normal and how long will it last?

I wouldn't say it's normal. How old is she?
The causes and mechanisms of stuttering are still something of a mystery. If she is near a university medical center, they might give her extra attention and study.

Sounds like she has suffered some sort of emotional trauma,
I would take her to therapist and find out what going on in her head.