Shape wear

I ordered this one https://www.shapewearusa.com/collections/body-shapers/products/carnival-silhouette-maker-ii

My seamstress recommended I wear this bustier for my wedding under my strapless gown (and she recommends it to a lot of her brides with strapless dresses—she said it is really good). I didn’t end up getting it, though only because I didn’t have the funds for it at the time.

I second the David's Bridal bustier. It tucks my stomach in nicely and gives me a really awesome figure, plus its comfy too. Wore for an hour for alterations with no issues.

I have been hearing excellent things about the Skims by Kim Kardashian West. Would this be within your budget? Check out the reviews, you're sure to find a ton online