According to my lmp, I am 11w 5 days pregnant, but ultrasound report showing 12w 4 days pregnant. How is this possible? Second, can I have a regular period if I get pregnant? Coz I remember I had my last period on 6th feb. Though I had it after 15 days of my last period, yet it was not just simple bleeding, it was heavy. I had to use 2-3 pads daily. And the period lasted for 3 days.