How to lose mom tummy??

I am 7 months postpartum and still wearing maternity clothes. I'm SO over it. I'm only 22 years old and thought I would just bounce back. I'm 5'2 and weighed 130 before baby. I had a flat stomach. I gained 25 pounds while pregnant and have lost 15. I walk 4 miles everyday with my baby and my arms and legs look great but my stomach is awful. I am also still exclusively breastfeeding. I feel so insecure. Getting dressed everyday ends with me in tears. I went to the pool today and saw a mom with a baby about my age and she was in a bikini and looked amazing. So I am READY to lose this mom tummy. But how? I don't really want to diet because I'm breastfeeding, is it absolutely necessary? What workouts should I do? Should I try the wrap things? A cleanse?? Give me all the weight loss (specifically for tummy area) tips!!!