Spotting of blood during the third month of pregnancy can be a cause for concern, but it is not always indicative of a serious problem. In many cases, light bleeding or spotting can occur due to hormonal changes or implantation bleeding. However, it is important to consult with your healthcare provider to rule out any potential complications. They will be able to assess your specific situation and provide appropriate guidance. If you experience heavy bleeding, severe pain, or other concerning symptoms along with the spotting, seek medical attention immediately as these could be signs of a more serious issue.