A pregnancy test 2 days after menstruation may not be a real period, but a bleeding caused by a pre-eclampsia, biochemical pregnancy, ectopic pregnancy, or possibly a fertilized egg in the womb. In this case, it is necessary to go to the hospital as soon as possible to determine the cause for treatment. 1. Bleeding from implantation: The fertilized egg can cause bleeding when it implants in the uterus, which may be mistaken for menstruation, but the amount of bleeding is small. This is normal and requires no special treatment. Regular obstetrical check-ups are sufficient. 2. Pre-eclampsia and biochemical pregnancy: This is manifested by a small amount of vaginal bleeding, bright red in color, sometimes increasing similar to menstruation, and may be accompanied by abdominal pain and a feeling of falling. If the value of HCG and progesterone in the blood is low, it may be necessary to treat the fetus according to the condition and pay attention to regular maternity checkups at the later stage. 3. Ectopic pregnancy: it is manifested by bright red blood, the amount may be more or less, and the abdominal pain may be more serious, and the diagnosis can be confirmed by ultrasound examination without the gestational sac in the uterus. After the intrauterine pregnancy is confirmed, pregnant women need to have regular maternity checkups, ensure sufficient rest time and do not overexert themselves. During pregnancy, it is important to relax, do outdoor activities appropriately, eat a reasonable diet and replenish the nutrients needed during pregnancy.