What Are The Early Signs And Symptoms Of Pregnancy?

37 days since my last period. I'm on a 33-35 day cycle. Took a test yesterday that came back negative. Husband was diagnosed with testicular cancer in 2002 and was told there was a slight chance that he would ever be able to have children. So, is it possible that his slight chance has arrived? And how much longer should I wait before I go see my doctor?