I need advice !!!!

Okay so I’m 16 yrs old and I’m not sexually active but I’m thinking of going on the pill not for contraceptive reasons ( but that would be handy obviously ) but for my skin. It’s a massive insecurity of mine and my mum said that when she went in the pill it helped her skin a lot. I also have reeaally bad periods that last for like 9 days and have me crying on the bathroom floor and throwing up in a toilet every single month and the pill would probably help. My mum said that she will take me to the doctors to help with my skin but she said that they’d probably just put me on the pill and that she’d be okay with that but I’m just not sure about it because I’ve heard so much about it making people gain weight and mood swings and just people hating being on it . What are your opinions about the pill? Do you think I should go on it bc I’m kinda worried I’m gonna react badly to it 😩😩😩