Ok, I finally remember one. I used to be afraid of needles (as in syringes). They don't hurt as much as they look like they will. And I used to have a fear they'd puncture something by accident or cut it open as it passed through my arm (like a vein or nerve or something).
The last time I got shots (which only several years back), I got 5 in a row in the same area of the arm one right after the other. The arm was numb for an hour or two because of it. While I didn't fear that, and I had this fear before this incident, I feared the needles themselves, fearing that they wouldn't put something good into me that would help me, but something that would hurt me, like poison. They looked menacing, sharp, and deadly. I also didn't trust the doctors when using them, fearing they might make a mistake, inject me the wrong way, or put the wrong medicine into me.
But that was my mentality on it as a kid, so I guess that doesn't count now. I haven't had to go to the doctor in a long time, many years in fact (not counting checkups), and when I do I just look the other way when getting shots. It goes by faster that way too. Same as when giving blood.