Breast tenderness and maybe headaches, too, are normal with any pill and go away with time. The moodiness is caused by a depletion of B vitamins. All birth control pills deplete these vitamins and can cause mood problems in some people because of it. Taking a B complex vitamin usally helps. The leg cramps are something else entirely, though. That's something that's listed under 'pill warning signs'. I wouldn't mess around with that one, could be a sign of a blood clot, I would switch pills.