I took a plan b the 31 of August which was the morning after i had unprotected sex. Sept 4th comes around a i begin to start spotting but it was light . The next day Sept 5th,looked like i had my period normal color like usual. However the next day the 6th was light spotting again. The week after I’ve been having consistent headaches daily and once of a while a stomach ache here and there. I never get headaches so i was thinking it was migraine, but I have no clue any thoughts or concerns??