This is indeed an interesting symptom. While working on a case, I came across this in T.F. Allen's MM for Lachesis:

Becomes easily peevish and mistrustful; believes himself intentionally injured by all his environments, and attaches the most hateful significance to the most innocent occurrences.

I thought it sounded similar to what you described.

[ 11. September 2003, 20:24: Message edited by: Tomi C. ]