This works.
I've mentioned my epilepsy on here before and that my dad died when I was a kid. Death is a very real possibility and something thats always been in my sub-conscious and since my son came along creeps into my conscious thoughts quite often.
I had two seizures in the same day in May (day of game 2 of Raptors series) and I turned into a total basket case. I was having daily panic attacks. I had convinced myself I was having seizures literally 10-12 times a day.
Finally, I went to a psychiatrist and told her I was having what I thought were auras and they were bringing on multiple panic attacks per day. I was feeling this sensation that felt like presque vu (similar to deja vu). I wasn't seeing anything but I was feeling a sensation that was as if I'd seen a cloaked figure (presumably grim reaper) and it said the word "down." Like an obedience, loss of control type of thing.
As I described this to her, she asked me questions to determine whether I was hallucinating. We determined that I definitely wasn't. I never thought I was hallucinating because I never saw or heard anything. I just felt like what I'd feel like if I'd just seen that. Basically pure terror at something supernatural.
She told me to replace these thoughts with positive thoughts that whatever this thing was that rather than it being some malelovent being to picture it as being a friend that was telling to me lay down as a service. So that if I really was having a seizure, I could lay down so I wouldn't get hurt.
Then once I replaced this with an image of a friendly force, to gradually realize that no friend would show up 5-7 times a day lying to me about seizures I was never going to have.
This worked in literally a week.
I went from a complete basket case having daily panic attacks to borderline zen.
I have a great deal of control over my thoughts after that one conversation.
What
@David. described is very powerful stuff.