I think the qualifier, "only if you have the time" might not have been a good idea if you really wanted her to call you, especially after she said she was busy.

I was concerned when I read the email that "didn't sound like her" -- do you know if she has a secure e-mail account? It could have been someone else with access to her computer? I would print out and address that e-mail, as ugly as it sounded, right away and make sure she actually sent it. She could have been away, busy, sick, etc. and not even gotten your e-mails but someone else with access to your computer may have. Too, if it was someone else, your T's not going to know you want her to call. I would just make a copy of that one, first, ugly e-mail and ask her if she did in fact send it.