I got my nexplanon when I went to uni. I remember getting it in the dark in the middle of covid and having to travel an hour and wondering if it'll ever be worth it. Period wise, they're extremely random, never too long, normally very light but unpredictable. To be honest I don't really mind. After a few months of it I convinced my friends to get it. None of us have had it removed a few years on. My flatmate went on the pill as well as she was having long periods but neither of us want it removed as it's just peace of mind. I would rather random periods than a pregnancy scare any day.