Guys and girls, how to be more confident?

im someone who has a strong personality and usually have some kind of confidence, but I've gone through a break-up (guy), a best friend break up, exams, and a whole much of wack stuff that I'm finding I'm looking for others approvals and I'm shy or something. I don't know how to explain it. Like I'm an extrovert, love talking, but recently its almost like I've been getting social anxiety or something. like Im afraid of what impression i might give of and just worrying about what others think of me. I'm finding my confidence is just gone and my old IDGF attitude is lost. I miss being confident. yesterday I got a haircut to spice things up, I like it, but some of my friends and family said its not that good, so now I'm regretting it but I still kinda like it.
Guys and girls, how to be more confident?
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