You're doing such a great job. The length of fast is entirely dependent upon how you feel and what you are thinking. 10 days is a lot! And it sounds like you are really ready with that medifast thing too, so if you need to come off the fast, don't worry, you should listen to your body first and foremost.
Did you try rubbing your belly? Also, maybe you need a nice warm bath, some Epsom Salts in there, some candles, some aroma therapy and some nourishing deep breaths. Good luck in listening to what your body is telling you and responding in the best, healthiest way possible!