I leaked some kind of fluid while sleeping - it's not uring and not amniotic fluid - what else?

Ok, this sounds a little gross, but I am dying to know what this is . . . In the middle of the night I woke up to find my lower body only was wet - not dripping - just wet with some kind of fluid that had no smell and no consistency. It does not smell like urine at all and I am not pregnant so it cannot be amniotic fluid - it was too much to be sweat and at the same time if it was sweat it should not have been just concetrated there. Any ideas?