Maybe this will be long but I want to cover as much detail as I can to get proper help, because I think I need it.
I'm 23 years old. I'm a Computer Engineer who got top 10 degrees in university, and I'm working in a private company (since 6 month) which some days ago told me they told me I'd get a raise because they're happy with me.
Who can't be happy saying this?. Well, I don't. I always say, to my family and friends that I'm not an "above average person" (which rarely they believes me). Well, believe it please, I'm not.
This is a moment in my life where I stopped to think why I'm not really happy about myself, and I think I came to the conclusion that my good performance comes from a really deep fear of failure about everything I face to do. I never failed in an exam, never fail a test in school, never fail in about anything I did...
I have to be honest and admit that I had fear about failing exams, I had fear about what others think about me if that could happend, meet expectations, maintain that image others believe about me... it seems that I value myself under the metric "good results" in a very "cold" way. All this was the fuel that let me achieve such good results in university; and the same happens with my job. In work, in such a short time a try to achieve the same level of expertise of senior professionals, and I put a lot of pressure on myself.
I know it's wrong to be so self-demanding, there's a high cost to pay (stress). All this seems to show a lack of confidence, fear of failure, giving value of myself depending of really not such important things in life.
I know this is not the psychology stackexchange (I don't even know that would be the right place), I just need some advice. I'd not be angry if this is closed, but who knows..
Edit: I'm asking for some resources (books, websites, etc) or personal advice that would help me overcome this situation. I believe this long term stress (if not solved) would eventually force my productivity to decline I guess worsening the situation.