My last period date on july 14 after that I had intercourse on August 5 only one day, then my next period date on August 15 but due to exam stress I don't know can I get period or not. After that September and October I missed period, but September 8 onwards I had intercourse continue many days. But September 28 I checked pregnancy tests at hospital it shows negative on urine and blood test. Again October 28 I checked pregnancy tests it showed positive and ultrasound show 7 week 2 day .and my due on june 13.then when did I actually get pregnant.