Have you talked to your teacher and told her about your results? I would think that a Smithie would clearly recognize another Seven Sister school as being an excellent institution. Sure, she might have been encouraging you to go to Smith since she is an alum, but she also knows that Bryn Mawr is also a great place to study.
Have you looked at the Bryn Mawr website? Read the student blogs? Looked at the gorgeous photos of the college? They have an excellent academic program there, beautiful dorms, and access to the other colleges and Philly. Check it out.