I wouldn't be hurt by it, but I'd just tell my T let's just cancel that session and start back up the next week. No need to be in limbo. I think your therapist is trying to be open to a session but the effect is really the reverse of what she is intending. Rather than being reassuring, it is causing distress because it is unsure and unpredictable. Just take the initiative and say thanks for the thought, but let's just both take that session off and get back on schedule the next week.