F.W.
Maybe try a different birth control method? I was shocked when I was about 10 lbs. lighter than my prepregnancy weight a few months after delivering my first child. I realized some of it was from breastfeeding and running after multiple daycare children but another big factor was the birth control I was on. Before getting pregnant I was on Ortho-Tricylen which had estrogen and progesterone. While breastfeeding I used Camila, a "mini-pill" that is progesterone only so as not to interfere with my milk supply. Was just as effective for me and did not make me gain back those extra 10 lbs. Maybe try a pill with low estrogen or no estrogen? Or Mirena? (IUD)