Hi,
I would have a urinalysis test run at your dr. Sometimes that can occur with a UTI or yeast infection. If you are really tired, and dream about having to go to the bathroom, but are to tired to get up, it can also happen. You may be thinking you have gotten up, and are in the bathroom, but your not. also, could you have had a seizure and not realized it, and urinated during it or after?
Kel