K.W.
My 4 yr.old daughter has struggled with night terrors. They are getting better, thank goodness, but this is what has helped us. (although they have no control over night terrors & have no memory of having them. This has just helped with the fears that she has going to sleep some nights)
We made a dreamcatcher together. (you can get directions online) I helped wrap it & she put some beads on it. I explained how the bad dreams get caught & the good ones go through. She was pretty thrilled by that concept. It hangs beside her bed.
We also made "bad dream" spray. It's just some lavender potporri type room spray, in a bottle. We spray it a few times and say "go away bad dreams". The bonus here is that lavender aids in relaxation.
I feel their pain though. My daughter has never been a great sleeper, but it is getting much better.
Good luck. :o)