An e-mail should help! I had similar story with my first therapist, btw 🙂 His phone was off, I could not leave a message, then got out-of-office reply from e-mail, but he called back himself after he read that e-mail (not that he was great as therapist, but it was the first step, nevertheless). So, at least now she has Your e-mail address and You cant just step back 🙂 Cheers to the brave! 🙂