it is possible but most likely you are just spotting. sometimes when a fertilized egg attaches to the womb wall a very little bit of blood happens. at the same time if you are not due for a period sometimes your body will discharge old blood when the egg is fertilized. it has been five days since you posted so if you don't have an answer by now i would buy an early detection test to make sure.
i had unprotected sex 2 days ago with my fiance now i am spotting. can i be pregnant?