My Wife Used Postinor 2 To Prevent Pregnancy But We

my wife used postinor 2 to prevent pregnancy but we realized that she is six weeks pregnant-thats after using d drugs twice not knowing she is pre gnant. please interpret this result of scan:
uss shows a gravid uterus with a single viable foetus CRL 8mm corresponding to GA 6weeks + 6days. liquor volume is adequate. internal Os is closed. Both adnexae appear free. pouch of Douglas is empty. no free pelvic collection sighted. no cyst. no fibroid