The above post has fantastic suggestions. I think perception has a lot to do with it as well. But I also wanted to suggest that maybe, when you start to become afraid, try just going to your "happy place" or a calm outside area where you feel safe. Don't think of it as projecting, just as a way to calm yourself. Just think about being in a beautiful and calming place, take a few deep breaths and try to relax. That's what I do when I get uncomfortable during my travels. I hope you have better luck!