Anxiety is a good thing. Yes, no, maybe?

Recently something just came into my mind. Every body is trying to heal it self, even if we dont think about it or even if we are afraid that it will not heal. When somebody is doing something that is not good for him, body react and warn you that you shouldnt do it or you will get burned.
So anxiety is response, that we dont do something good in our life. Maybe our knowledge about life is not good (we are not realistic), maybe the way we do things is not good, etc...
For example: I am singer and i have some technique problems, and i cannot solve it so i think about my feelings when i sing. (in singing singing technique everybody talks about feelings because everything happens inside of mouth) There is a problem, i am hypersensitive and feel thing i shouldnt, thing that are not rational. So i practice, not doing concrete things and think and trying to change how i feel, only feeding my anxiety. I thought that i will find an easy way, that just pushed me down.
After talking to psychiatrist we came to conclusion that i dont have faith in my professor, and in myself. Than i tried to be real, i now know think otherwise, my professor is good, her students are successful so ill believe in her and do what she was talking to me all the time. Practical things, i thing about the sound, about the way that my mouth and tongue stay etc... Sensually! not feeling but what i can hear, smell, see, fell with my skin (i can say touch but u can sense air and not touch it), taste and it gets better, i try not to think what i feel so much. It realy got better, all of it. I now enjoy music when i hear it, not analyzing so much my self. (Yea i analyzed myself even when i listened the music.)
But there is always bad side. I often have that tendency to analyze myself and after hour of practice i realized that i dont know what i was doing all that time, i remember but it is that anxiety circle i come in and not being aware.
Ill practice harder to not get anxious and to get into that magical circle. To stay on reality and real life and problems etc.. To really deal with my problems, not to try to find easy way and to analyze so much because some of that problems made my health anxiety. I mean my health anxiety of not dealing with real practical problems etc...
When i realized this that i think too much about feelings and that make me anxious in other parts of life, i became to thank anxiety that she is the one that told me you are doing it wrong. Accept and embrace your self what you are and do some practical thing, manage your life and time and all other useful advices...

What do you do think, is anxiety good for you or not? What did you learned from your anxiety?

Maybe i spell all words correctly but i always say sorry for my English because it is not my native language and i dont use so many phrases and i use many same words over and over, times are not always good in complicated forms of sentence. And sorry because even if my English is perfect this story would be hard for understanding!

"Happiness is a matter of choice"-Kitt
:)