What to expect 1st visit?

I have my first exam with the OB thursday. They said they'll do a breast and pelvic exam (I'm assuming that's no different than what they do at your yearly?). And they said probably a sonogram to figure out how far along I am. I've had a sonogram once before to check for cysts, is it about the same? and by chance do you know how much the prices range for a sonogram?