I've had problems with constipation and bloating all my life, then around AF time would be the only time it that would go away, just for a few days. Because with a tilted uterus it faces backwards instead of forwards, it can be pressing on your bowel.
All that time they thought I had endometriosis (then found I didn't) and kept telling me there was nothing wrong with me, even that the pain I felt DTD was in my head and just happened because I expected it to happen, all that time it was as simple as that - your insides kind of face the wrong way!
Worth getting checked out Shrillian, they can tell from a two second internal. I feel like at least some things make sense now!