Assuming that you are in sound medical condition, I am a big believer that ANYTHING is possible if you put your mind to it.
I think that surgery is too often referred to as a 'safe alternative' to getting in shape by leading a healthy lifestyle. It's quite simply not a magical cure. Surgery should only be considered after ALL other avenues have been exhausted.
Consider what you have done so far in regards to your health and fitness. Ask yourself the following questions:
Do I KNOW how to eat properly?
Have you done your research? Do you know what foods are acceptable and what aren't? Do you know how to read food labels? Do you know how many grams of fat, protein and carbs to consume in a day?
Diet is obviously a very important factor here - it will make a HUGE difference to your weight concerns. The beauty about these 12 week challenges is that by being consistent with your diet for a number of weeks, you form a completely new eating habit. No more yo-yo diets or magical supplements - as far as I'm concerned, THEY DON'T WORK. You must ensure that this eating lifestyle is healthy and something that you can live with.
Do I KNOW how to exercise effectively?
Exercise will of course make an enormous difference to your physique. What I learnt from my challenge is that, prior to my research, I never knew how to exercise effectively. Knowledge is power - and with that power you can reap some amazing results. There are two types of particular interest, cardio and weight training.
With your cardio training, you don't need to run for hours on end to lose fat. This can become boring and time consuming - you can lose interest VERY quickly. By increasing the intensity of your cardio workouts, you challenge yourself whilst expending more calories in a given time. Not only that, once you get off the cardio machine, your metabolism will be raised for a longer period of time - which means you'll be effectively burning fat even after your workout!
Your resistance training will also increase your metabolism. The more muscle mass you have, the higher your resting caloric expenditure. But don't be scared to get in there and challenge yourself with the weights either! Higher intensity here will produce some great results.
With your exercise, it is important that if you are unsure of how to train, enlist the help of a professional to show you how to achieve your goals.
How much time and effort have I invested into improving myself? Is this enough?
Ask yourself if you really have put in 100% into your transformation. At the end of the day we have to accept responsibility for ourselves. Put yourself right at the top of your priorities. Remember, this is not selfish - you NEED to look after yourself. Once you look after yourself you can then look after others.
There's a lot of information on this website about all of the topics discussed above. Because I can only go into limited detail here, if you're unsure of anything please visit our forums - we have a whole section dedicated to women's training.