No I don't think it's fair, especially since you do not have a pattern of cancelling. I was in the ER for a kidney stone the night before a session. I actually didn't want to miss my session, so I went. When I told T what happened, she exclaimed, "What on earth are you doing here? Why didn't you call and cancel?" Not wanting to tell her the truth, I told her because it was within 24 hours. She told me, "Oh my gosh, I don't follow that policy unless the person habitually no shows without calling!"

You should say something to your T, velcro.