what is the verb, adverb or term to express that you are thinking of something that doesn't exist, or no one is thinking about it, but it is NOT positive, e.g. you are thinking that someone is going to harm you or kill you or someone is following you a long way but there isn't .
so, "imagine" doesn't sound like what I need.
These are some related words, but none of them are necessarily exactly what you're looking for. fantasize, obsess, fret, agonize hysteria, anxiety, irrationality, paranoia, obsession What you describe sounds like paranoid fantasies . CJ
New words, one handy idiom, and a 2-minute quiz — delivered to your inbox to keep your streak alive.
These are some related words, but none of them are necessarily exactly what you're looking for.
fantasize, obsess, fret, agonize
hysteria, anxiety, irrationality, paranoia, obsession
What you describe sounds like paranoid fantasies.
CJ