I have a phobia of always thinking something's wrong with me. Like, if my head hurts for a long time, I'll think I have brain cancer. Or if my chest hurts, I'll think it's my heart. Or if I'm around sick people, and I get 1 symptom, I'll think I'm getting it too. And lots of other things like that too. (Dunno what it's called though..)
Maybe because I had a near-death experience when I was 7? Which leads to my phobia of Dentists as well.. because it was a dentist's fault.
which also leads to my phobia of balloons. only the rubber kind, though. But I have a good reason for that, so I'm not too worried about it.