It is important to consult with a healthcare professional for an accurate diagnosis, as there can be various reasons for experiencing severe cramps and heavy bleeding with clots at 5 weeks. While it is less common, some women may experience bleeding during early pregnancy that resembles a period. This is known as implantation bleeding and typically occurs around the time of your expected period. However, if you are concerned about the possibility of a miscarriage or ectopic pregnancy, it is crucial to seek medical attention immediately. A healthcare provider will be able to evaluate your symptoms, perform necessary tests such as ultrasound or bloodwork, and provide appropriate guidance and treatment options based on their findings. Remember that every pregnancy is unique, and it's always best to consult a professional for personalized advice.