The 32-year-old delivered the child June 15, and now she wants to get her perfect figure back, reports InTouch Weekly magazine.
"Kim is obsessed with getting the baby weight off, and fast. She really believes she can lose the first 30 pounds in the first month. She wants to look good in a bikini by the end of the summer," a source said.
"She got so big. So now she wants to look as hot as possible," the source added.
Kim fears that she might never be able to look as she did before.
"She's terrified she will never get her body back. Everyone has told her not to stress - that it's about being healthy and having a good mind-set for your baby, not about losing the weight right away," the source said.
"But her family knows that at the end of the day, Kim will do what Kim wants," the source added.