Not necessarily you will have contractions while amniotic fluid is leaking BUT you must still rush to hospital to check on your current amniotic fluid level and baby's health condition as less water may distress the baby in the womb. Please rush to hospital without any further delays. Contractions happen every 1 hour, 30 minutes, 25 minutes and even faster later on (hardening of your womb and ligaments area and heaviness in the chest which requires you to breath in and out each contractions to reduce the pain).