me and my girlfriend had sex with a condom on April 9, she took plan B two days later as a precaution, she bled 6 days later for 4 days, then she got what she thought was her normal period on time (APril 28th) and it lasted 6 days. Now, she is 3 days overdue for her next period and she has white discharge. she has taken at least 15 HPTs (all negative), and had a negative blood test at the doctor's a week ago. could the tests be wrong? could she still be pregnant? if not, what could explain the discharge? please help- we are very worried