Dress for prom?!?

Hello!

I'm so stressed out!

I want to find a beautiful dress to wear to prom in a month, but I don't know where to look.

I'm not ugly, but I'm also not very pretty and I don't have a perfectly flat stomach and lovely long legs, so lots of the dresses I have found online would not be suitable.

I also don't want a dress that is too revealing!

Where do I look for a dress that is not too expensive? I can go up to 100 pounds but I don't have any more money than that.

I want this to be a memorable occasion, and I don't want to mess it up by being the only girl wearing something that doesn't suit her.

Btw I'm 18, I'm 1.70 cm and I have reddish hair, if that's any help :D

Thanks so much if you have any suggestions.

xxx