Hi ThisWayOut,
"............when under stress, I always resort back to sh"
No, you don't
You've coped with some REALLY hard things/memories/feelings without sh, you've had incredible strength and you should be really proud of yourself for that!! Really proud!!!
It's "just" that this time the stress got intolerable, right??
And you are trying to deal with something/s many, many, many........people would "struggle" a lot with, so time to give yourself a break over where the build up of that stress led you, hey??
A slip should not define "the bigger picture", the truth in all the times you haven't sh'd despite..........try to remember that, yes?? So you have, in reality, been doing so well.
Still stressed, still hurting though..........??? So I'd say that you were right in considering talking to your T about it, maybe she could support you in adding to your coping tools/skills. Although you only have 3-6 sessions left at least she may be able to support you in some practical things that work for you to add to what you've been doing.......or things to start working on for yourself.
And if one thing holding you back a bit from talking about it is feeling shameful........please try not to be ashamed. SH is by no means the "easy fix" to an "easy problem" for you is it??!! Not in the slightest!!! And your T should be respectful of your feelings, what you're going through and supportive. So any which way you can drop in a reference to it.
You really do deserve her full support.

Alison