I was thinking about starting birth control to lighten my periods because they are always too strong to the point I can’t even sit walk or do anything. And since I have sex with my boyfriend. But I’m kinda nervous because I don’t know

How my body will react. I heard it gets harder to get pregnant (I’m only 20 so that isn’t my plan right now) and that you gain weight or lose it. And all this other stuff but I don’t know everyone body is different. What should I do? Try it or let my body be lol. Any advice helps! Thanks!