pretty enough to rush

I get it, you weren't blessed with the greatest bone structure or don't have clear skin. Most of us don't. There's nothing you can do about that, but what you can do is learn to become a makeup pro in the next few weeks. You can look up "makeup before and after" pictures as proof that there's no reason you can't go from a 3 to a 6. And if you're CONFIDENT, wear cute and flattering dresses, and are able to do your hair, the way you look shouldn't hold you back at most houses.

If you suck at makeup/hair, there are like 5637837 tutorials on youtube and you have 3 weeks to learn. Get to it and practice.