birth control suggestions?

Before I start my actual post, I just wanna say that I read the comments on my last one and I really appreciate the suggestions I was given and I'm really glad I don't feel like I'm going through this alone anymore. Thanks so much for all the help 🫶🫶

For context, I'm 16 and I've been having these debilitating period cramps since I was around 12 and they've only been getting worse. They really disrupt my daily life and I'd be better off with no periods at all. Recently, I've been looking into and considering birth control.. But I'm not really sure what kind to get? I saw a lot of people saying it had made them bleed for weeks or even months after getting on it, and it's kinda just putting me off a little, and also people saying they gained weight? I'm pretty skinny myself, so a little gained weight wouldn't really affect me too much, since not having a period to worry about would probably encourage me to be more active anyways but I'm still a little worried about that..

So, if anyone has any suggestions for birth controls that can stop my period, won't have TOO many side effects and is also available in the UK, I'd be really happy to listen. Any help is appreciated and I would also love to hear about other people's experiences on the pill!!