What do people have anxieties over?

One of the most frustrating for me is when something changes, particularly at work. I go into panic mode, sometimes I kick up a fuss and become resistant, then I actually do the thing and wonder what all the fuss was about. I also get severe anxiety when I give the wrong information out. 

One of the things I  get anxious about is when something new comes up at work and I am thinking  to myself how am I am going to do this am I going to get it wrong etc?  I always take notes if I am being introduced to a new task or being taught something new and even then I am thinking to myself have I got all the relevant information down? What about you do you write notes when learning new things?  I also get anxious if I have to approach some people to ask if I am not sure about something.  Some people I don't have a problem in approaching to ask a question but there are others I don't like to approach. 

One of the things I  get anxious about is when something new comes up at work and I am thinking  to myself how am I am going to do this am I going to get it wrong etc?  I always take notes if I am being introduced to a new task or being taught something new and even then I am thinking to myself have I got all the relevant information down? What about you do you write notes when learning new things?  I also get anxious if I have to approach some people to ask if I am not sure about something.  Some people I don't have a problem in approaching to ask a question but there are others I don't like to approach.