I have no idea where this came from, and home he doesn't have some psychic power thats telling him I'm going to die

he's only 4, he hadn't been near any other children since Friday, so a few days ago and i'm just baffled to where this has come from?
Have any of your children said anything like this??
Boy is that familiar,
I started a little later then t4, I think I was close to 10, dd started about that age, 4. It is a panic attack, I felt so crushed as she would climb in bed, and then say she was afraid to die, I went through the same thing, some nights still I go from bedroom to the other checking on the kids, curling up with them.
Dh has gotten use to me just reachig over and holding him and panting, so terrified to tell him I am afraid to die. Things are right in my life with my beliefs, but would miss my family so much.......
They are not so bad at night now, for dd, but day terrors have been triggered by a lack of her ability to not control her surroundings, Mainly from things she should deal with..
EX, she was having the anxiety/panic attacks and not sleeping well for school, She is an excellant student.
If kids were teasing, her or anyone, if someone got hurt she panicked,.
THe staff at school were no help, bullying started and she developed school phobia,
I would contact the pediatrician, They deal with this all the time. There are ways to divert the attacks with changing into light moment of good memory,
Identify the triggers, scary shows, cartoons that are brutal, even Scooby doo would upset dd,
Now at 14 she is okay with Scooby,
BUT terrified of Aliens. Big time dead serious, She reads alot of Steven Hawking to prove me wrongI tell her that they are humans in the future a million years from now traveling back in time to see if there is something that could protect humanity.....
The witch part, he may have vivid dreams, not getting a deep sleep and a great imagination that plays out scenarios. Try creating a book time of great stories to have this be the last thing in his mind when he sleeps.
Keep an eye on it to pass, or if it gets chronic....
My hugs to you Mom, reinforce happy songs, and get the mind from the panic.