1) Needles, I absolutely hate needles for some reason. I have no issue with surgery or cutting but it's something about metal objects piercing the skin. It's so bad that I have difficulty giving blood without passing out.
2) Panic Attacks/Anxiety attacks. It feels like you cannot breathe or are having a heart attack and everything is either in super fast motion or slow motion.
3) Laws, I always feel concern if I am doing something wrong, maybe it's just because of the type of work I am involved with stopping bad people, but I constantly see new laws being passed and worry about all this stuff regarding the DMCA/Intellectual property laws and fear losing everything I've worked hard for and having my rights taken from me. That could also be part of the anxiety, but I tend to be more cautious than normal people when thinking about if something should not be done.