Oh boy oh boy.
Just want to say I GET it. I've been thru the same kind of circumstances with my T and reacted the same kind of way. It is just so HARD to be that level of vulnerable with someone and have them cancel sessions when you NEED them so much (yes... even when the cancellations are totally legitimate and beyond the Ts control). The need for self protection (by withdrawing / rejecting the T) is so real.
I also know (from years of going thru this cycle myself!) that it IS a cycle... and I can see that you are working your way thru it.

Keep at it. You and T will get back on the right footing again soon, even tho this whole vacation thing is still throwing it all out for a bit. I know it is frustrating and hard, and it would be SO much better if there weren't all these breaks happening at the moment. Unfortunately they ARE happening and there is nothing else to do but wade your way thru them as best you can, and hold out for when you and T can get back on track with your appointments. Hang in there.