Thanks for the query.
I understand your concern.
The possibility of pregnancy is less in your case as usually ovulation will not occur during menstruation in case of regular periods.
Pain abdomen, burning sensation etc you are having could be due to pelvic infection or urinary tract infection transmitted due to the intercourse.
If the symptoms persist, better to consult your doctor and get evaluated.
Hope this helped.
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.