I would be upset at the sonogram picture, but honestly, if you post pictures up on Facebook you are really handing them over, and can't expect to retain control. That is the nature of the internet, and particularly the nature of sites like Facebook. And it's another reason why I refuse to use FB. I am very careful about what I put up on the internet.
As for the other pictures, I think you should feel flattered rather than annoyed. Pictures you post are really no longer 'yours', and imitation is really flattery.
Where she crossed a line was in her intended use of your picture, imo, not in copying them in the first place.