It can be a phobia, an scenario/ situation, "thing," worry etc.

I have this strange 'phobia" of certain textures. I wouldn't necessarily call it fear, but it irritates the crap out of me when I see it. The closest similar phobia that I have discovered to describe it is trypophobia. Let me google that for you

I have a fear of one of my loved ones (specifically my dad) developing dementia. Seriously, I don't know what I would do. In my culture it is completely unacceptable to abandon loved ones to nursing facilities. This is especially true considering I spent 3 months in one for school credit, and I have seen how little tenth's of a f*ck these people care.

I'm sure I have a few more "situational" type phobias. I'll edit them in once I think of them.