So I went to my first alterations appointment and the dress more than fits (probably needs to be taken in a bit), but the bra/shapewear is SUPER TIGHT. I got it from David's and the lady took my measurements and ordered it based on those, but when I put it on I get back spillover, which I don't like at all. How do I get rid of 'back fat' (I've never had a problem with it before in my life until now!)?