Hi. Thanks for asking in Healthcare Magic. The amount of amniotic fluid is maximum between 34 to 37 th week. But sometimes urine or vaginal secretion is mistaken for amniotic fluid. Since the possibility of infection is more after membranes rupture, it is essential to confirm if the leakage is not amniotic fluid and you have rightly done so. Since the examination has been done by the Dr and the necessary assurance has been given, I think there is nothing to worry. If your wife hasn t developed fever, abdominal pain and uterine contractions then there is nothing to worry. Sustain is an anti oxidant and nutritional supplement and this will not cause rupture of membranes or leakage. It is imperative that 37 weeks should be completed to prevent premature labour. As for as the muscle tightness in concerned, she should discuss with her treating Dr whether it is alright if she does some muscle stretching house work like sweeping. I hope this is useful.