I am pregnant. The sonographer has put me at 4 weeks, but the nurse, using her little calender has put me at 6 weeks and my ovulation date is the 28th of october. Now, i was being sensible and had been taking my pill...but unfortunately it failed! The dilemma is that up until the 27th i was seeing a guy and the last date that i slept with him was the 25th. However, on the 27th i got back withy boyfriend after a year and we slept together on the 27th and 28th of october. So i don't know who the father is. I'm in such a mess! If i'm 4 weeks then it's definitely my boyfriends.