I have one hallucination story from many decades ago.
I had a difficult relationship with a woman and ended it.
She was very angry with me and I thought there was a possibility she might try some sort of retaliation.
I lived several miles away from her but was absolutely certain I saw her stalking me in my neighborhood.
I later was able to verify beyond any doubt that it never happened—she had moved completely out of the area—it was just my paranoia on over-drive.
I would have easily passed a lie detector test that I had seen her at this exact spot at this time and date or that exact spot at that time or date.
I was stalked by a girl once.
She was never my girlfriend, but we did go out a few times. She definitely developed a fixation and started stalking me for a brief while (in NYC).
She even stood outside the brownstone where I had an apartment. She stayed there for about an hour and I had no way out without passing her.
I was paranoid as hell for a while. It still gives me the creeps.