my girlfriend went out on the 27 of nov to the club without me because we got in a fight. the next day she said she started her period. i was suspicious of the use of emergency contraceptive, seeing how she is not on birthcontrol and prefers not to use condoms. i let it slide because i wanted to reconcile and her regular menstruation cycle is at the end of the month. i left town for one week on business on the 3rd of dec, returned on the 10th. upon my return i had discovered that she had spent time with another man she called an old familyfriend during my absence. this occured on the 6th of dec and as far as i know it wasthere only encounter. she started spotting and having bad cramps the day i returned, lasting a few days. could this possibly another use of an emergency contraceptive? or maybe one scenario a mens cycle a the other scenario use of an emergency contraceptive? im torn and broken over the evidence. i want to believe her claimed innocence but i feel betrayed and cant seem to find comfort. any thoughts or info on the probability of 2 periods in 2 weeks would be greatly appreciated, as well as any info on the use of emergency contraceptives used either before or after her period in the time frame stated. or the effects of possibly using emergency contraceptive twice in two weeks. her alibi's fail to bring me comfort. any medical info would at least be a something i can trust. i apologize for my digression. thank you for your help.