When I was 14, already a fierce feminist, I did a school project on periods through the ages. It wasn't very insightful or detailed as pre internet so not a lot of accessible sources. As I recall the Ancient Egyptians used the cellulose inside reeds as tampons, which sounded like a plan. In the Middle Ages ordinary women just bled - another use for reeds, in this case the ones used to cover the floor.
However my memory is a bit sketchy. 14 is a long time ago now. 