Hepatitis B Window Period extending 6 months

I am a male nurse. I was sexually active and I had homosexual activities way back year 2007. I had signs and symptoms for Hepa B last January 2007. I was tested reactive to Hepa B on February 2007...then on October 2007 I was tested non-reactive...My physician said I got an acute Hepa B. She advised me to wait for the window period...I had 8 tests which said HbsAg = Non-reactive and Anti-HbsAg = Non-reactive with quantitative result of September 2010 --> 0.7 (>1.00 normal) and November 2010 --> 0.394 (>1.00 normal). I've been HbsAg non-reactive for 2 years already so I am kinda confused that it has been 2 years and still I got Anti-HbsAg non-reactive. Please help me with your opinions. Thank you for your replies.