I agree with many of you, scheduling issues happen, and it was most likely not her intention on triggering me. I don't even know if I am "triggered" as such or it was just one extra thing on top of the rest.. The feelings that it has brought up have just been so relevant to what we have been discussing.
We have had a couple of scheduling dramas before, one which resulted in the same amount of time apart, but it was on me - I was the one who cancelled with good reason. T has good reason on this count, but she cancelled which I guess I wasn't ready for.. I donno. It'll all be fine.
Thank you to everyone for your responses!! It is good to hear from others about this stuff