Mustard Seed

Some years ago I submitted a prayer request asking for courage to get weighed in for a mandatory physical, because I was so humiliated. Today I was told my weight actually exceeds what the scale can register, which means I've gained around 200 pounds in the last 20 or so years. I am on a weight loss medication, but I can't seem to make even small changes. I'm such a conscientious person in other areas of my life and I just don't understand why I am behaving like this. I need a miracle, or the faith of a mustard seed, or something...because I don't have any power to change. I am a 46 year old woman. .