I have also had occaisional problems. Magnesium helps. You're likely already taking a Cal/Mag supplement. Try taking an extra 50mg magnesium tablet before you go to bed. I also take Metamucil; a heaping tablespoon in water before bed. I've tried senna, but the cramps were awful.

I have noticed that just prior to my period I am almost certain to be constipated. Could this be it?

Good luck! Take a book with you!

Janice