Have you Heard of a Menstrual Cup?
They say that one cup can be used for almost 12 hours. So it's really convenient to use especially when you are sleeping at night or doing outdoor activities during the day.
The cup also comes in different sizes depending on how heavy your flow is. It's also not difficult to use. Just follow the instruction and watch a lot of videos on how to fold it properly. It may take some getting used to but once you have perfected it, it's a breeze!