I'm in a really different position than many others on here. I never call, have never called, even when I probably should have. And emails are just to keep him up to date on what's coming up for me (recently, it is just the variety of reactions to our recent sessions), so although I send them, they're more so he's in the loop about what my brain is doing on the stuff we've been discussing, what stuff he says/does that is helpful, where I was confused or conflicted. I never get a response for those outside of session, when we discuss them.
However, T encourages me regularly to text him, even just to connect when it feels like he has disappeared off the face of the planet. In fact, at the end of last night's session, when I was having the usual internal battle about leaving (dragging the kids out the door), he showed me his phone and reminded me that my texting is welcome. I told him I hated it and he said he really likes it and we both acknowledged that some parts of me do too. So, even though there are real life triggers causing me to need to check in, most of the contact we do is, "Ack, this is going on and I just need to know you're there!" or just sharing where I'm at.
I've learned to be very clear when I just need somewhere to express myself vs needing to hear back that we're still connected. It has been working really well that way for the most part. He used to direct me to God everytime I was freaking out (my T's version of "use your skills"), but it felt so much like being pushed away that it was counter-productive when the reason I was needing to connect was to know that he was out there. It's not that he doesn't mention God at all anymore, but in the context of "I'm here and God is carrying us through" whatever is going on.
Anyway, my T is super-encouraging of attachment, it seems. In fact, he said as much, literally last night. I don't always know if that is good or bad. Ironically, the more I have allowed myself to be OK with it, the less I feel panicked and dependent (and then angry and resistant to those feelings right after) and the less I really seem to need in response. I'm not freaking out about whether or when he is going to respond. If I've asked for a response, I know I'll get one eventually...if not, then I don't need one. I'm more able to go about my day after sending my thoughts and feelings. Ironically, it is when I try to fight against the attachment that I cause so much havoc inside and end up becoming even MORE needy and dependent.
I don't think this is necessarily helpful, because your T obviously has different boundaries than mine does. It would be nice if she would clarify what those are a little better for you. I know it would be hard for me to feel safe to reach out after the experiences you've had and especially without clarity on what her boundaries are. What I do when I'm in your position is usually text my T: "_________ happened and I'm freaking out, anxious, etc." then explain the things I am already doing to deal with it on my own (praying, verses that are helping me wait through the feelings, reaching out to support network if it's a safety thing, journaling, etc.), and let him know it would also be helpful to just know he is there when he gets a chance. That seems to work really well for me. I still feel like I am handling it, utilizing all my resources, including T and all it really takes from him in response is five minutes to read my texts, pray for me or whatever, and send, "Still here!" or something that reassures me on that account.
Sorry for the long explanation. It took me months to sort out how it could work for me and sometimes I still get in a really resistant mood and kind of reboot the whole process by refusing to connect for several days out of stubbornness regarding not wanting to attach.