I'd def talk to her about it. I'd let her know that you have been struggling with some things and really need to know if you can count on her for support. When I first started with my T, she cancelled a number of sessions. She had some health issues, but still. I finally told her compassionately that I understood she had some issues to tend to, but advised her that my mental health could not stand to suffer because of it. I volunteered to find a new, reliable T. Well, my T didn't realize the impact her absence was having on me. We were new to each other, like you, and my T just had no idea how much I really needed her at the time. There were no more cancellations (though we did wind up having a few phone conversations instead of in-person sessions which was just fine).

Hopefully your T will realize that she needs to step up and be able to be there for you as scheduled. Make sure she understands that you are counting on her for this. If the cancellations continue, I'd get out before getting into deep. Good luck!