It is common for pregnant women to experience changes in vaginal discharge throughout their pregnancy. In most cases, a spot of white discharge at 16 weeks pregnant is normal and not a cause for concern. The hormonal changes that occur during pregnancy can lead to an increase in vaginal discharge, which may appear white or milky in color. However, if you notice any other symptoms such as itching, burning, a foul odor, or an unusual amount of discharge, it is important to consult your healthcare provider as these could be signs of an infection. Additionally, if the discharge becomes pink or bloody, it is essential to seek medical attention immediately as this could indicate a potential problem with the pregnancy. Overall, while some changes in vaginal discharge are expected during pregnancy, it is always best to consult with your healthcare provider if you have any concerns or questions about your specific situation. They will be able to provide personalized advice and guidance based on your individual circumstances.