Dropping the "baby weight" 2 years later

Hi Everyone, I am Karry. Just started using myfitness. Had my son 2 years ago and since then I lost 75lbs, however I am on the quest to lose the last 30 and its soooo hard. Just wanted to introduce myself and talk to any other moms who have been there, maybe give some advice on how to "tighten" up that which my son deflated! Also need some help killing off these last 30 lbs. Been doing low carb and dropped about 5 lbs, they are right the last bit of weight is the HARDEST!!!!!!