I recently had a baby. my water never broke and when i got to the hospital & my ob went to break my water it was already broke. how is this possible?

Previously leaking?: The bag of waters may previously been leaking all along during the pregnancy. Usually it will re-seal if the rupture isn't gross. If you were losing fluid that was vaginal and watery during the pregnancy then that would be conclusive. Usually low gestational fluid (oligohydramnios) is picked up at an ultrasound during your pregnancy. Keep this in mind if you go for another pregnancy.