Experiencing heavy bleeding during pregnancy can be concerning, especially if it starts as brown blood and turns dark red and slimy. While it is difficult to determine the exact cause without a medical examination, there are several potential reasons for this bleeding. It could be a sign of a miscarriage or an ectopic pregnancy, which requires immediate medical attention. However, it is also possible that the bleeding is due to other factors such as implantation bleeding or cervical changes. To ensure your health and the well-being of your pregnancy, it is crucial to contact your healthcare provider immediately. They will evaluate your symptoms, perform necessary tests, and provide you with appropriate guidance based on your individual situation. Remember not to panic but seek professional advice promptly for proper diagnosis and care.