When the HCG is elevated, it usually means pregnancy, but when you have a period, you need to clarify whether the vaginal bleeding is a period or abnormal bleeding. If pregnancy is confirmed, it will not be a period, but it may be a case of bleeding in the bed, ectopic pregnancy, pre-eclampsia, biochemical pregnancy, etc. 1. bleeding in the bed: some women will have bleeding in the bed when the fertilized egg is in the bed, usually the amount of blood is small and the bleeding will stop soon; 2. ectopic pregnancy: ectopic pregnancy refers to the development of the fertilized egg in the bed outside the body cavity of the uterus, and there will be vaginal bleeding and abdominal pain when the ectopic pregnancy ruptures. When an ectopic pregnancy ruptures, there will be vaginal bleeding and abdominal pain, which may be mistaken for a period, and the pregnancy should be stopped immediately by a doctor; 3. Pre-eclampsia: if the HCG is too high but there is vaginal bleeding, it may be a pre-eclampsia, usually accompanied by abdominal pain and other symptoms, and early treatment should be given to preserve the pregnancy; 4. Trophoblastic tumors: such as staphyloma and choriocarcinoma, which can lead to high HCG, but vaginal bleeding can occur at 6-8 weeks of menopause, requiring treatment with uterine clearance or surgery.