For me, a better way to explain what therapy does to you is that, among other things, it can help you become more aware of your needs and emotional responses. Now I don't know you now and certainly not what you were like years ago, but I wouldn't be surprised if you felt the same then but weren't aware of it. I also find frustration and sadness to be an appropriate response, especially since this happened the second time in a row (if I'm understanding you correctly) and especially since you were looking forward to this session. As for not having empathy, well, I think you actually do show empathy when you think about her and hope she's okay - that's my take on it, at least. I hope you'll have a session soon and that it will be worth the wait!