See Through!!!! Need Help!!!

I know i am not technically having my prom this year....well okay it is only graduating the 8th grade but i am in desperate need of help!!! I got this gorgeous white glitter dress and i luv the way i look in it and it took a while to find a good dress. The only preoblem is that it is SEE THROUGH!! The top part where the bra goes isn`t because it has a built in bra but no matter how i do it my underwear shows. At first i tried on white panties but that DEFINITLY din`t work. Then i went out and bought a white thong... Well that did not work out either. The straps on it definitly showed and that is a total NO-NO!! So if you are reading this i definitly need to know what to do by this wednesday June 3rd. I want to wear panty hose and was thinking there might be panty hose with built in underwear but i don`t know can you please help me!!!??