Thank you for your query.
Since you say that your period started off on Monday following the sexual intercourse on the preceeding days that is Saturday & Sunday the chances of a pregnancy from that instance of sexual intercourse are almost meek as implantation cannot take place when the woman is bleeding. If your bleeding has been normal as per your routine schedule & your cycle was on time you probably need not worry.
Hope that answers your query. Have a good day.
These Q&A’s are for educational purposes and should not be relied upon as a substitute for medical advice you may receive from your physician. If you have a medical emergency, please call 911. These answers do not constitute or initiate a patient/doctor relationship.