Pregnant, period. What's going on?

After pregnancy to menstruation, if just pregnant, may be a small amount of bleeding caused by implantation. Pregnancy after the continuation of irregular vaginal bleeding may also be a sign of ectopic pregnancy, ectopic pregnancy may also be accompanied by strong abdominal pain, while doing B ultrasound can see the gestational sac is not in the uterus. After pregnancy bleeding, there may be threatened abortion, generally less bleeding, often dark red. A small amount of vaginal bleeding may also be due to vaginal infection, such as vaginitis, cervicitis and other gynecological diseases. After pregnancy, bleeding should be treated in time, to the hospital for examination, to find out the cause of bleeding.