it most definatley could still be your waters, or more likely your fore-waters which is the bag in front of your babies head, not all waters break like this, when fore waters go the head then nestles up to your cervix and stops anymore from leaking out until you cervix dialates more, if things havent progessed, ie contractions started by the time 69 hrs are up I would go back to the hospital for another check up
I would ask to be rechecked.
Also they have a strip I believe that can test to se ei you have