Hi, Ok i missed my pills this month, I had my period on 31/july had sex on aug/9 and he pulled out. Had strong orgasm and have felt period like cramping since it is now the 14th the cramping came immediately after orgasm. What could this be? It cant be pregnancy because its not something you feel immediately. Could i have pulled a muscle when i contracted? i also have uterine fibroids? could this be it. Im not on an insurance right now so i really cant get to the doctor. Help!!