Grad Insecurities??

So, my grade 9 grad is tomorrow and I mean grad. We have the whole shabang. Anyways, I feel really insecure because I’m the only girl in a long dress and I’m not as small as most everyone else. I feel like I’m too big and too short for my dress even though I’m 5’6” and 1/2. Also I feel like my nails aren’t pretty enough cause it’s my first time getting my nails done and I didn’t really know what I want. I’m honestly kinda dreading tomorrow, I’m scared I’ll be made fun of because of my upper back fat and chunky hips. I did include pictures and I would really appreciate some reassurance.