It is not considered normal to experience bleeding after holding in urine for a long time during pregnancy. While occasional spotting or light bleeding can occur due to hormonal changes or cervical irritation, persistent or heavy bleeding should be evaluated by a healthcare provider. It is important to consult with your doctor or midwife to determine the cause of the bleeding and ensure the health and well-being of both you and your baby. They may recommend further tests or examinations to rule out any underlying issues such as urinary tract infections, bladder problems, or cervical abnormalities. Remember that every pregnancy is unique, so it's always better to seek professional medical advice when experiencing any concerning symptoms.