A few years ago I was a BC and made me gain about 10 Lb's in 3 months, which is insane!!! MY gyno put me on water pills, which relieve monthly water weight gain, puffiness, bloat, swelling, pressure caused cramps, related fatigue, tension, "blues" and irritability. They also helped relieve menstrual pain and the discomfort of cramps, spasms, backaches, breast tenderness, muscular aches and pains due to overexertion, stress and strain. I found them really helpful!! I went off BC for about 2 yrs, and just got put back on due to Endometriosis....and I told my doc about th problems I had last time, and now I'm on Tri-cyclen Lo.... It's great so far, been on it for a month and no problems! Before I was on Alesse and had terrible side effects from it.... definately talk to your gyno or doc if problems continue....
I found this article that might be helpful to you...
http://www.dietary-foods.com/html/oedema.html