Ok, i'm just gonna come out and ask....why is the conception date so important? Is there more than one potential father? No judging, just wondering...unless you're trying to figure out a due date, then i agree going off your last period will be pretty close. The drs usually assume a 28 day period and you're so close to that.
Dobs, and J, all i can do is offer hugs

J, maybe you should move toward moving out...ugh i just know you would if you could. So i don't know what i'm saying...i just hate thinking you'll be pregnant and under all the stress from your batty mother at the same time.
Dobs, are you still hoping for a bfp then?
Cb, cute bump! i am so envious of your belly! I've just seen photos of me in the snow and man, my face is getting round. I'll be getting my ass back into gear with weight loss soon. For now, just shoveling snow is enough of a workout! But i'll be getting back on my stationary bike soon, and hiking/running when the weather warms up.
Speaking of which, how's weight loss going mrs?