It is not uncommon for pregnant women to experience increased vaginal discharge throughout their pregnancy. However, if you are noticing a water-like discharge specifically at 30 weeks, it is important to consult with your healthcare provider. While some increase in vaginal discharge is normal due to hormonal changes, excessive or watery discharge could be a sign of amniotic fluid leakage or other complications. Your healthcare provider will be able to evaluate your symptoms and determine if further investigation or treatment is necessary. It's always better to err on the side of caution and seek medical advice when experiencing any unusual symptoms during pregnancy.