First, you need to burn more calories than you consume. An active woman can consume roughly 2000 calories per day, but you need to assure that you are exercising enough to burn those calories. Exercising early in the day and before eating helps boost your metabolism and will facilitate burning fat and subsequent weight loss.
Also, do not rely on aerobic exercise alone. That will help your heart stay healthy, which is good, but if you want to burn fat, you must also engage in a healthy regimen of resistance training/ weight lifting. Cardio workouts alone won't do it.
You must also be realistic about your weight loss. Losing 1-2 pounds per week can be healthy but losing 5+ pounds per week is not. It is also not sustainable. Weight loss occurs for a variety of reasons including fluctuations in the amount of water that is being retained in your tissues. If you are getting married in approximately 22 weeks, losing 2 lbs per week would mean you would lose 44 lbs. before your wedding. You have to realize though, that most people do not lose 2 lbs every week. That is because you will naturally plateau when your body becomes accustomed to your new routine. If you think about it, it isn't realistic to think that your body will continue to lose weight unless you resort to ever more drastic measures.
Other things to remember are that muscle weighs more than fat, genetics play a factor in what type of body and fitness level you may be able to achieve and you have to allow yourself to "cheat" on your normally healthy diet once in awhile.
Finally, you have to stop looking at your routine as a diet and execise program and look at it as a lifestyle. If you can't adopt your healthy routine and maintain it for the rest of your life, in the end, it will be doomed to failure and the weight will come back...plus some.
Check out this hub if you are interested in more tips for losing weight the healthy way...