I m 20 yrs old, before one week my precum is drop on my gf uper leg and on her panty, and she washed it wid water then she washed her hand wid water and then with dat hand she washed her vagina,but we dnt want to take a risk so,she takes a unwanted72 pill ,plz tell me it avoids the pregnancy???then after 6 days the vaginal bleeding is started,,,,we both scare and in fear what is going on,,so plz tell us sme advise,,,,plz plz plz,,,,we r in tention