Depends on how crinkly it is Sometimes it'll improve with time, and your DD is only 11 wks, so give that some time hun.

I lost all my baby weight and some surplus - 36kgs in total, and I can't get rid of it and bub number 2 is 12 mths old now. The only real way to get rid of it is surgery, there aren't any magical creams or exercises to get rid of the excess skin.