Congratulations!! I can't really say. I know that in my first trimester (I am 22 wks now with my first) I had some trouble sleeping at night. I think it was mostly the excitement of this new phase of my life, and also my anxiety over thinking I would have morning sickness. Anyway, the sleepless nights went away probably starting my second trimester. Good luck!
It actually started way before I found out I was pregnant. In retrospect, now I know why I was having insomnia, must be the hormones. The insomnia has continued... Each night I go to bed at about 9:30pm and get up around 3:30-4:30am and am up for the day. Maybe it is already nature's way of preparing me for the night shift when my baby arrives. In any case, I have never had this crazy of sleep patterns ever. I have always slept through the night!..Interesting!
With my first pregnancy I had insomnia very badly!! I've always struggled off & on with it...but it got worse when I was pregnant. It started almost right away (although the first couple of weeks I think the lack of sleep was due to excitment and anxiety).
With my current pregnancy (#2) I've only had a few sleepless nights...could be due to the fact that I have a 16 month old DD to REALLY wear me out during the day.