Sweetie I am so sorry you are in so much pain. My former T did free sessions for me and also met with me on Saturdays, Sundays and holidays. When I said something about feeling guilty she reminded me that she offered, I did not ask, and that she would not be doing it if it was not something that she wanted to do. I suspect your T feels the same way. Don't ignore issues because the treatment is free. She if you can reschedule, but don't be surprised or hurt, if she has given your time slot to someone else. I did this with my T once. She has a long list of folks waiting to get in and when I said I wasn't coming she started calling. Taught me a lesson.