Well, trying with hormonal things like either the pill or the depo shot is something some will do to attempt to staiv off this heavy bleeding you describe. I think it doesn't sound like it is working. my mom took progesterone since her imbalance cause non stop bleeding but she had lighter bleeding. You kind of describe the peri menopause type bleeding that many have. I did. Brutal. My friend got an iud to help. Not sure how it does but it did. Are you bleeding for 15 days straight you are saying? That's a lot. https://www.healthline.com/health/how-to-stop-heavy-periods#prescription-medication