I would have assumed he meant that you were having another boy. But I read into things a lot. When I was pregnant with my most recent baby, we had a scan at 18 weeks, and we asked to keep the gender a secret. We had a genetic screening (the baby was fine) but we were talking to the genetic counselor about hereditary things, and she specifically said, "Because of your family's genetics, your baby has a higher chance of being color blind. I mean, IF it's a boy." I was totally sure that she slipped up, and told us we were having a boy (which was what I wanted!) but no. We had a girl.
I hope you get your baby girl, and the tech was just tactless.