I too have this, and also had a emergency c-section but i have found that sucking my tummy in while walking is helping a bit & the odd sit ups (and i mean the ODD ones!) help too. I've also started doing weight watchers myself too, sofar i've already lost 1.5 kilo's in a week! YAY! - guess it really wants/needs to come off! The trick for me not to eat junk food is - i just wont buy it, otherwise im ating it! As for the wobbly skin - on me its there forever, the streching after my first DD left me with way too much skin.
Gook luck!