It is not uncommon for pregnant women to experience traces of blood when blowing their nose or spitting. This can be attributed to increased blood flow and hormonal changes that can make the nasal passages more sensitive and prone to bleeding. However, if you are concerned or if the bleeding becomes heavy or persistent, it is important to consult with your healthcare provider for further evaluation. They can assess your specific situation and provide appropriate guidance and recommendations. In the meantime, you can try using a saline nasal spray to keep your nasal passages moisturized and avoid excessive force when blowing your nose.