It is possible that the spotting you are experiencing could be implantation bleeding, especially if you have had a history of late positive pregnancy tests in previous pregnancies. Implantation bleeding typically occurs around 6-12 days after conception and can appear as light spotting or pinkish/brownish discharge. However, it's important to note that there can be other causes for spotting after a period, such as hormonal changes or cervical irritation. If you suspect you might be pregnant, it would be best to take a home pregnancy test or consult with your healthcare provider for further evaluation. They can perform a blood test to confirm pregnancy and provide guidance based on your specific situation.