when should it stop ?? 😩

hi!! i’m on nexplanon and also on my first period that i’ve had with it. so far it’s been 7 full days, before they were only like 4-6 days.. it’s also been kind of backwards in a way? like, it was SUPER light at first and now it’s slowly getting heavier. i’ve been having sex which might be affecting it but i don’t think so lol. i’ve just heard horror stories about like 3 month periods and that makes me want to die even thinking about it. thoughts? i know it’s kind of unpredictable but just want to know if anybody has any guesses or anything 🤐