lamaze bradley or any childbirth classes

Well I am now at week 20. Went for an ultrasound 8/9 and all looks well we are not finding out what it is so that was not an issue though the tech must have known she said she wont even put it in the report so that must mean she knew. Has anyone started childbirth classes we started the bradley series of classes this past monday and it seems great its a 12 week class and focuses on natural childbirth I guess I am a little crazy. Is anyone else doing this class or started any other birthing or baby classes. I have a regular drs appt today so I get to hear the baby. I feel pretty good and cant believe this is 1/2 over.
Lydia