Period Help? I’m 16 and have no clue how to handle this

G

I just turned 16, and it seems like every time I get my period it’s more painful and heavier than the last. I’ve been wearing overnight pads as my regular pads since I was 14, and it’s starting to impact my daily life. I ride horses and whenever I’m on my period I can’t ride without soaking through my pad or getting worse cramps. It’s gotten to the point where I feel like I can’t do anything but go to school and lay around for 4/7 days of my period. I have a regular schedule, I’ve never missed a period, the only irregularity I’ve had is that when I first started my period, they would last for about two and a half weeks, skip another two and a half and then come back. That went on for about three months but after that they’ve been completely normal.

If anyone has any ideas as to why this happens or how I could manage it better, I’d love to know!