Weight Gain

I have been on the mini pill for about a year. Having heard at it can cause weight gain, I significantly changed my eating habits and do my best to be active. However, I've gained 30 pounds since starting the pill and nothing helps. I feel awful about myself and have even noticed awful dark hairs around my chin area. Does anyone have any tips or tricks to losing weight on the pill? Similar experience? Is there a birth control option that doesn't have so much weight gain side effect?