Just wanted to reiterate that you should talk it through with her. When my marriage counselor and I had a misunderstanding over the summer involving boundaries, it felt like a knife through my heart--like I literally felt pain in my chest. That was largely due to transference and stuff from my past rather than him specifically, but there was still the instinct to run away. But I still went to our regular appointment that Monday, and (along with my H), we talked through it some then. Thought I was OK, then a few days later started feeling upset again. So I brought it up in the next session. Then the session after that, when I was finally satisfied with his response and explanation. I think it ultimately strengthened our relationship, and I feel more secure with him now. (It also helped me understand some more stuff about my childhood and past relationships, which I explored with my individual T.)

So I think it's good you're planning to keep the appointment. Be open about what you're feeling right now. Anger, disappointment, etc. She can handle it. Hopefully she can explain what happened and make you feel secure with her and that she still cares. Maybe you can come up with a way in the future to let her know when you do want a response to a text. I've only texted T and MC a couple times, but with e-mails, if I want a response, I generally say something like, "Please at least let me know you received this." Then they'll usually say a couple lines, too. Otherwise, I've learned that I shouldn't really expect a response.