I've recently purchased this WC dress and I need something to go under it to streamline my shape a little bit. I'm a pear shaped, size 10-12 but due to curved spine and possibly too many cakes my stomach sticks out a bit which kind of ruins the line of the dress. Don't get on with control pants/tights - they seem to give me the runs (does this happen to anyone else?) so I was thinking some sort of slip just to smooth things out a bit? Any ideas? TIA