Lossing the weight after turning 30+

My name is Angie and im having a problem losing weight. I was always small (size 4-7) and weighed 117 pound till I turned 30. After that I begain to gain weight and by time I realized it I was 186.4 3years later. Its new to me and I need to find a way to lose weight in my belly and my chin.If anyone has gone though this or is going though it now like me please join and/or add me to your friends list its help each other get the weight off and keep it off.