That was a good article, though it made me sad to realize it's typical for doctors to not take their patients seriously.
I used to go into shock nearly every month, and frequently wound up in the ER - only to be told that "some women can't handle pain". No one took me seriously until I developed a cantaloupe-sized ovarian cyst - at which point they did a hysterectomy, and discovered I'd had severe endometriosis for decades, and no one had ever believed me.
Sorry you're dealing with bad pain too... I hope you can find a doctor who understands these issues!