Do you feel that the people around you feel fear or express his symptoms? If this is true, then most likely, long repressed fear that had accumulated in you, ready to break out, but at the same time you can not be aware of it and feel quite calm. If something scares you, meet up with the cause of fear. Most likely, it will be unrecognized by you as part of your soul. If you are having misgivings, maybe your intuition is trying to tell you something. Listen to it and act accordingly.