I don't think you're stupid at all! ((((((whenwillitend))))))
The biggest way that 9/11 continues to impact my life is through my fear of flying. I was in the air on 9/11, flying from London to Los Angeles. Our plane got turned back to London halfway into the flight. Even though everyone on our plane was really lucky because we were totally safe, it still made me very fearful of flying. And every time I fly now I think about what those airline passengers in the hijacked planes on 9/11 must have experienced......Since that time my fear of flying has increased not decreased. And I don't think that is so unusual. The idea that time makes everything easier is not always true.
Good luck to you (((((whenwillitend)))))