It isn't uncommon to spot and still be pregnant. In some cases, spotting during pregnancy can be normal. In other cases, it is a sign of possible complications.
According to the American College of Obstetricians and Gynecologists, spotting occurs for many women during the first 12 weeks of pregnancy. One possible cause of spotting is implantation bleeding. The American Pregnancy Association notes that implantation bleeding occurs six to 12 days after conception. Spotting can also be caused by cervical irritation from intercourse or a manual exam. Late in pregnancy, it can be a sign of cervical changes that signal impending labor.
Spotting can sometimes be an indication of trouble. In some cases, heavy spotting or bleeding is a sign of miscarriage or placenta previa. Any spotting should be reported to a doctor or midwife.