Necklines are my nightmare Ally
Having a small frame means a lot would be too baggy even without additional problems, I am paranoid about showing things you really don't want to be on show (the unnatural kind). The dusky pink flowery top is lovely, really nice-looking and comfortable too, I wore it yesterday.
Btw if all else fails the trick is to buy vests (NOT Gok shaper ones, but with just a little bit of elastane) in a size smaller than usual, then worn under a top they cover everything up. But it's not ideal as it's a layer you don't necessarily want.