I am very self conscious about myself and how I look when I go out in public
That's good! Having heightened sense of self-awereness if very important
I fear that it makes me less able to enjoy things because I worry about it too much. Where do you think that comes from?
feelings of self-consciousness are sometimes associated with shyness or paranoia.
Impairment.
When feeling self-conscious, one becomes aware of even the smallest of one's own actions. Such awareness can impair one's ability to perform complex actions. 
Adolescence is believed to be a time of heightened self-consciousness. A person with a chronic tendency toward self-consciousness may be shy or introverted.
Psychology.
Unlike self-awareness, which in a philosophical context is being conscious of oneself as an individual
everything is a numbers and calculation game." In 2016, he added: "I am very systematic in how [I] need to go about things to bring out the best tennis for myself, and maybe that comes off as mechanical and robotic and those kind of things, but I don't know if I'd ever change that because I feel that's the way I get the best out of myself when it comes to my tennis."
Aspects of Raonic's game which have been criticized include his return