call your doctor and ask him for suggestions
Go on a detox diet, you can start with 1 week, then move to a few weeks, then months at a time, its totally safe as long as you take some vitamins on the side. There are many different detox diets that range from different foods you can eat, some are purely liquid diet, but most involve eating no meat. If you can go without eating meat of any kind, chicken, beef, pork etc, you will lose lots of weight.
stationary bikes like the ones at la fitness