Have anyone had problems with hormones after childbirth? And how did t…

Have anyone had problems with hormones after childbirth? And how did they cope? During my pregnancy, I was put on hormones that didn't suit me. They caused blurred vision, swelling, nausea and lots of sleepiness. After their discontinuation that same day, all the side effects went away, but I started gaining weight and stretch marks appeared immediately (it was 3 months of pregnancy), I ate little, moved actively, but the weight kept increasing and I gave birth already at +30kg. Now the weight is as it was after giving birth, 75 kg, and it remains. I have been doing long sports activities actively, running, swimming, proper nutrition, but the weight still stays at 75kg.