How can i lose weight fast?😀😣😣😭

My health has been crappy lately.. and sleeping schedule and i need to lose weight but idk why this weiggt has been sticking onto me since 2022... when i gave birth to my last baby.. my stomache, arms upperbody is fat..: i need to get rid of it. Im also on birth control so this birth control makes u thick i guesss but im not even eating that much lately so idk why im still fat