Birth control help

I'm about to start month three of my birth control which I've just started taking for the first time ever and I've gained at least 15 pounds. I'm not sure what I should do because of this, I have ate less and been working out. I also have a job that I'm always moving at so I don't see why I've gained so much weight. The pill I'm taking is called Junel FE any advice or has anyone had this same issue?