Hi Linda
I think most people feel like this to some degree I certainly have. I approach it in two ways the first is mental discipline. The constant thoughts of concern about others opinions need to be kept in check. If you are conscious and aware of them you are able to ignore them, let them subside, carry on regardless, focus on the task in hand and consistency will help you move away from them so they are more balanced.
Maybe a weekly or daily challenge to yourself to do one thing you know will attract attention and comments but you will do anyway and make a point of being happy and certain about it.
The second approach I have is, why I am concerned, why do I care. Is it a mental habit that I have these thoughts? Is it because I want to please everyone as we all know this is impossible. Am I protecting my image, my ego?
I usually analyse first then use simple tasks and challenges to start a change. A Tony Robbins event usually helps get you over any self-consciousness very quickly
One book I found very useful for conscious discipline is "Taming Your Gremlin: A Surprisingly Simple Method for Getting Out of Your Own Way".
All the best,
Dan