I understand, the last time I talked to my mom, several months ago,she was her usual verbally abusive self and was recanting some abuse she particularly enjoyed(not abnormal for her), she started to talk about something which triggered me to black out, and well for two months straight, I had a real hard time like you did, I couldn't tell where my body began or ended. And I had a hard time moving, everything was foggy, and I was having a hardtime not floating out. I had a lot of chatter and internal conflict of how to proceed with mom. We all decided to make DH deal with mom's daily phone calls, which pissed her off to go on a rampage and caused even more flashbacks, & trauma. Long story short, in my situation, mom was triggering me over and over again with her gloating about her various abusive behaviour when I was a baby. It still don't know what she said just what she said beforehand, all I know is when I ask about it, I got crying inside and now everything is quiet.
Cutting contact with the abusers, and eventually putting my siblings on email only helped me get to the point of stability that I could see a T(I didn't know how to even put it in words, how do I explain I felt like I was walking in a fog or my body felt heavy, suffocating(T3 told me that was depression). T3 has helped, but coming here was the best thing(and most effective), reading and talking in this forum. Oh, and if you can talk to your ISH, it really helped me alot to make things stable till you can take over. Also, I'm working on better stress coping mechanisms, and learning to set healthy boundaries.
I understand your in a really sh*tty place right now, it took about 6 months for me to feel 'stable' again after that one phone call. About 2 months to stop the floating and numb feeling from happening all the time.