You rsystem could be in evacuation mode getting rid of some nasties. Definetly start drinking more water to make sure you are well hydrated you should also consider drinking more lemonade.
BTW the most common cause for the SWF (Salt-Water-Flush) not working is that one is not well hydrated and the system will try to retain all fluids. If you significantly increase your water intake for a coupla days you might wanna give the SWF (Salt-Water-Flush) another shot as that is the most efficient/effective way to keep the toxins moving out and it washes your whole GI tract top to bottom.