I’m really nervous

So I ordered a gothic Lolita dress from 42lolita I ordered it on the 12th of December plus I wanted to wear it to a jiluka concert in march also the dress said 30 days is that how long I have to wait? I’m just really nervous since i ordered it for the concert ╥﹏╥ plus i got these really cute heels that have bat wings(╯︵╰,) I spent 128 dollars for both of them but like I really hope it comes in January or else i’m f ed I don’t wanna wear pink to the concert!!Ó╭╮Ò