Sorry but it sounds completely normal to me. I did the same for the first trimester (ok, and beyond). Firstly I was excited, wondering about how bubs would look and how they would grow up. Then I worried about would s/he be bullied at school and how would I deal with drugs and teenage sex. My thoughts went haywire. It was the strangest feeling as I am normally very organised.

DH thought it was bizarre. Even now has to tell me things twice or more and often has to attract my attention as I am daydreaming.

I did it throughout my first pregnancy and am still doing it with my second. DH is looking forward to holding a conversation with me where I don't space out on him.

Good luck with your pregnancy.