did horrible as someone with imposter syndrome

hi i have imposter syndrome which simply means i feel uncomfortable being perceived by people, even in a good way.. actually specially in a good way its so overwhelming to be told i did a good job when i studied or achived something i always downplay my achievements or even hide them till people find out and are confused why i hid that

i am very into fashion though, so was looking for a prom dress(obviously for prom) and the dress i bought was a little... too much

i didn't think/consider how my classmates would dress but i realized most of them will be wearing simple dresses like black or green any plain colored dress and the most dramatic one would probably just get it sparkly

i bought a dress thats a gown that looks more like engagement party or even wedding dress my mom really liked it and said i should wear it when i get engaged, thats how "too much" it is, but i saw alot of plain prom dresses i even have one, but these dresses dont do it for me, they just feel boring for my liking (they look good on my classmates /friends though)

terrified of the attention i might get whether positive or negative honestly, what do u think i should do go with my other more plain dress or just wear this one?