Hey Lemon.
Someone already mentioned writing a script, but I just thought I would say that is what I do as well. And then I practice like 100 times so I don't sound like I am reading it! LOL
If you did not leave T on a bad note, I bet she will be happy to hear from you. I once left a T and just sent a letter quitting. Months later I called her to make a truce because it always bothered me. She was really happy to hear from me and made a special appointment to see me so that we could end properly.
Good luck! It will be ok.