I've been on Loestrin for about 4 years and have not really had a...

I've been on Loestrin for about 4 years and have not really had any problems until about 6 months ago when I moved to a new city, gained some weight, and started to get unbearable breast pain/sensitivity. My gyno put me on 5 days of a pill to rid my body of water retention and my breast sensitivity was gone. But it returned after this short treatment. He is now suggesting that I take a month off of birth control and see if that fixes the problem. If so, he wants me to try the Nuvaring, but those side effects scare me. Anyone had the same problem?