Is it normal that i've completely reinvented myself?

I'll start off with saying that I'm not an unhappy person.
However, I've recently taken the time to look back over the years, and have discovered what a massive change I've undergone... In elementary and high school, I was an insecure tomboy, band geek, and outcast. I was excessively awkward, only had one boyfriend, and despite my confident exterior, I was constantly questioning myself.
When I was eighteen, I moved away from my hometown to go to university on my own, and as soon as I hit new soil, I started fresh. I dressed more confidently, made the executive decision to put myself out there, learned how to do my makeup right, and told myself firmly that even if I was a little wacky, I could still be social. I joined a sorority, the theatre club, the university newspaper. And I made a ton of friends from all different social groups...

So why am I still so afraid, quietly, of that awkward, strange teenager I was at sixteen? I'm scared of what people may think of me if they see photos. I'm ashamed of some of the angry, violently anti-conformitive people I used to associate with. In a lot of ways I've become a different person, but wheras then I was scared of never fitting in, now I've found my feet, and I'm petrified of a regression. I don't understand it. It's completely unreasonable, and I wish i could just shake the feeling. I've lost boyfriends because I'm uncomfortable being called beautiful. Compliments make me back off. This can't be normal...but I'm wondering if anyone's gone through a similar situation.