last minute PROM help!

So of course, I love to procrastinate and do things at the last minute so I need to ask for help and ideas for my prom which is on May 30th. 
I still haven't taken my dress to get it altered. I still haven't found heels that I liked, well I did but you can only get them online and they're completely out of stock. I don't know how I want my nails to be painted. Most importantly, I don't know what to do with my hair. I want a half up half up hair do because I want my hair to be up but I want it down because I have quite the long layered hair and it looks cute up so I'm looking for ideas if you guys have any pictures or suggestions for hair and maybe even add cute gems in my hair I'm not sure yet. I know how I want my makeup so that's all set except for lip color. A blue dress is hard to match with things. I was thinking a nude pink/brown color. 
I'm going for silver sparkly for HEELS and NAILS. And any suggestions to add to my bottom half of my dress? Or just leave it? 
So any pictures that you guys have to help out will be greatly appreciated! I need to get this done and I'm completely stumped. 
Put pictures in the comments of heels and where I can get them in time and hair and nail ideas! Thank you! Makeup ideas are welcome too!
This is my dress
I hope everyone likes my dress as much as I do!