skycastle, I hope you can bring this back up next time. I have done this before, too - not able to remember something important T said because I was so anxious in the moment. You can even give her suggestions on how to handle this next time, something like leaving a message, "This is T and I wanted to let you know that I received your message" and then talk about what could come next - an offer to talk at a specific time, for example. Or, it might be that she will leave a more detailed message next time if she knows it's okay to leave a message.
I'm glad you were able to talk to her about the call.