(Welcome to PC toonkate)
AWWW I think the T knows your issues, and was great in asking! I hope next time you can ask her, "Would you do that?" I think all of us, with a T, worry from time to time that the T will leave.
Please do discuss her return call policy. It helped me to do that with my T. He says if he doesn't return my call within the hour, to call again, as it may have dropped off or been unintelligible. Of course, other Ts might need several hours, but it would be good to know what to do rather than wait in axiety, imo. TC