I just wanted to chime in here. I had really scary insomnia because of anxiety. I started Zoloft and it seemed to get worse, but I now know that it was the anxiety about the insomnia that caused it. Now that I have been on Zoloft for a while, I am sleeping better than I have in a long time because my anxiety is so much better.
I hope that gives you some reassurance. It may take a few weeks to kick in, but it is a good medication. I have a friend who gave birth to a beautiful baby girl while taking it and she is just fine too. Take good care of yourself and your baby!