body after 2 kids

2 kids in a 15 month span, 2 weeks pp. I need motivation to get me through the following weeks until I can do something about it, i'm really not liking this body. I know you can be beautiful with stretch marks but that doesn't mean I like them on myself. Plus i'm really hating the saggy skin on the bottom of the belly. I'm only 23 years old I fear my body is gonna look like this for the rest of my life now.