I am 1 month and 5 days delayed on my period. We had contact on july 2. I've done hcg test, urine home pregnancy test and blood test on july 29, all negative results. Until today, august 21, I did home pregnancy urine test and result is negative. Doctor gave me duphaston for 5 days. If I did not have my period after taking duphaston, does it mean I am pregnant? Thanks.