Down with the Camel

It seems that in the last couple of months I have really ramped up my water drinking. Not really conciously, but I find that at the end of a meal out I will have drank like 3-4 glasses of water, at work I'm always heading to the water tank to fill up my glass and at home I'm always in the refrig. filling up from the brita. Yet strangely I don't feel like my bathroom habits have changed. Where is all this water going? Do I have perhaps an invisible hump where it is all being stored?