If your periods have resumed after 2 days of having sex then you are not pregnant at all as all the endometrium is being shed and there are no chances of implantation even if there would have been fertilization even in cases of delayed ovulation.
So rest assured, you are pregnancy safe,
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.