So it turns out...it's more likely that a pelvic floor "bulge" has caused this issue. I'm set to have surgery early in the summer!
It's an anterior rectocele, and my uterus apparently slips down also when i go. So...they're going to do robotic supracervical hysterectomy along with stitching up the bulge. One happens laprascopically and the other through the vagina. yikes, but anything is better than not being able to "go" and getting backed up for years. I'm so thankful there's an apparent fix.