I asked my doc for similar help several years ago, leading up to a month-long event with hundreds of km between facilities. Don't know if it's available in the US, but she prescribed Cyklokapron (tranexamic acid 500mg). It's brilliant; reduces flow and duration enormously so life becomes manageable again. No side effects (for me) and it's not banned-for-competition. I've had a couple of doctors since and most haven't heard of it, but they confirm it's quite safe when they look it up. Good luck.