Hormones can be a major factor, no question. I've noticed drastic changes to my guts depending on what my hormones are doing. The pill can
help, so it may be worth a try. For me personally, it's excess estrogen in my system that causes most of my ongoing health problems. So adding the pill just made things worse. But that's not the case for everyone.
Unfortunately, doctors know about as much about hormones as they do about bowel disorders (basically nothing!). So it's a matter of trial and error, and maybe seeking a good naturopath or homeopath for assistance.
But hey, at least we get a solid warning that Aunt Flow is on the way, huh?