There's a saying: Sometimes Its a "grower" not a "shower". Besides It really doesnt matter at this point as others have pointed out you are not done growing yet. And Its what you do with it that counts!
answered question
If you hear a metallic scraping sound when you brake in addition to shaking you could need new disks (brakes) because they are warped.  If it only shakes while moving and you don't hear anything funny your tires could  be miss aligned/un balanced  -uneven tire wear can cause shaking feeling.