Talk to Gynecologist on Pain In Stomach After Periods

I’ve had intercourse on 1 nov and took ecp within 24 hours or less I think, on 13 nov I was having brown discharge and after that had my periods (not on my exact date but before my date) my periods lasted for 4 days usually, but from the time my periods are over I am having stomach pain and back pain ( bearable)which come and goes, sometimes I feel like to eat something and sometimes I don’t even like something, kindly tell what should I do? Am I pregnant or what