Amazing job on all you've done so far! Yes, please get some new clothes - it'll be even stranger at first, but it will help you.
Give yourself time. Lots and lots of time.
I lost 80+ pounds over the course of a year or so, and have been at goal for almost 2 years, and it STILL is weird occasionally. That's OK. Mostly, I've completely adjusted, but it's fine to have your mind blown by your new body and new clothes and new sense of self.
Be patient with yourself, and keep on going! You're doing great!