two days before period.

Whenever i was ovulating for the month of september me and my fiancé started ttc, donnie its two days before my period and i tested using two cheap $.88 tests and then i used First Response (6 days sooner than your missed period) test and they all came out naked. Is it still possible for me to be pregnant? Please help. I feel so horrible, because i want this so bad and so does my fiancé.