You said that she stated that she was at a family commitment and would "attempt" to contact you on Saturday ... Attempt doesn't mean can or will (be able to).

You do understand that sometimes there are situations in which they simply cannot be there for us?

That is when we have to find other ways to get ourselves through it in some other manner.

Call a hotline.
Call a friend.
Go to some kind of group meeting.
Come here (PC).
Something (anything) other than self-destruct ... Even if you just sleep through it.

One person simply cannot be the only go to we've got ... That's why it's important to set us up a support network so we'll have plans b & c to fall on when plan a is not able to be there for us.

It's all part of the healing and recovery process and something we all must eventually learn how to do for ourselves.

Not much of a consolation when we're in the throes of meltdowns, triggers, flashbacks & whatnot, but a truth nonetheless.

Hope you've found a way to deal constructively with this until you see her again.