I think I figured out part of the Sherman method or something similar
Anyway, shortly after I read that post, I started doing some breathing exercises called SRI. I noticed that when I focused my breath on my lower abdoemen while I was on my period it caused me to gush. When I do that at the beginning of my period it starts heavier and I have only one heavy day and then spotting. Without doing the exercises, I have a heavy day, a medium day, then spotting. I haven't been able to control my periods as much as Sherman claims that you can under her instruction, but I'm getting better with practice and it is an improvement!
What I do is I place my hands on my lower abdomen. As I breathe in through my nose, I imagine that I'm filling the area under my hands with energy and breath, expanding the tissues. Then I breathe out through my mouth and focus on contracting and emptying the area. There is no bearing down. The pelvic muscles are relaxed. I do a few breaths while I'm in the shower or on the toilet. When I do this at the beginning of my period I have some really heavy bleeding for the next few hours but it gets my period over with more quickly and is less crampy.
Maybe it's all in my head, who knows, but it could be worth a try if anybody wants to give it a shot. Let me know if it works for you!