Assuming you do not have an illness, have you considered trying probiotics? Thyt contain lots of the good stuff that is in Yorgurt,. They are available everywhere and may help to adjust the bacteria in your system so that it begins working correctly again.
nthin but did u have sex??? and wat is ur age?? do u have periods?
im thinking some sort of virus.... just letting itself pass thru u. drink lots and call md if it duznt stop considering u culd become dehydrated