I know that with some of us, having our monthlies, makes our crohn's worse(I'm going to for my exam on Thursday so I can only have my menses once/3months)...I've been on BCP since well, forever (alas, it seems longer than you've been here
probably 20 years or so, dang now I feel old)...
Anyway...you probably want to discuss this with your doctor...but it HAS helped, and a low dose estrogren might help too (that's what I do...I was kinda sensitive to the higher levels in other BCP, and loved it when Loestrin came out)...